Browsing by Author "Skipworth, Heather"
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Item Open Access The application of form postponement in manufacturing(Cranfield University, 2003-09) Skipworth, Heather; Harrison, AlanPostponement is widely recognised as an approach that can lead to superior supply chains, and its application is widely observed as a growing trend in manufacturing. Form postponement (FPp) involves the delay of final manufacturing until a customer order is received and is commonly regarded as an approach to mass customisation. However, while much is written in the literature on the benefits and strategic impact of FPp, little is still known about its application. Thus this research project aims to address how FPp is applied in terms of the operational implications within the manufacturing facility. Here the ‘postponed’ manufacturing processes are performed in the factory where the preceding processes are carried out. An in-depth case study research design was developed and involved case studies at three manufacturing facilities, which provided diverse contexts in which to study FPp applications. Each case study incorporated multiple units of analysis which were based around product groups subject to different inventory management policies – FPp, make to order (MTO) and make to stock (MTS). The same research design was used in each study and involved both qualitative and quantitative evidence. Qualitative evidence was gathered via structured interviews and included the operational changes required to apply FPp in a previously MTO and MTS environment. Eleven quantitative variables, providing a broad based measurement instrument, were compared across the three units of analysis to test the hypotheses. This combination of qualitative and quantitative evidence in the case studies helped to triangulate the research findings. Comparison between the three case studies provided further conclusions regarding operational implications that were context specific and those which were not. The research concludes that the manufacturing planning system presents a major obstacle to the application of FPp in a MTO and MTS environment. In spite of this, and even when the FPp application is flawed, the benefits of FPp still justify its application. The research also contributes two frameworks: one which determines when FPp is a viable alternative to MTO or MTS; and another that illustrates the major operational implications of applying FPp to a product exhibiting component swapping modularity.Item Open Access Balancing the exploitation-exploration paradox during major geopolitical disruptions: the importance of supply chain structural ambidexterity(Academy of Management, 2023-07-24) Moradlou, Hamid; Skipworth, Heather; Bals, Lydia; Aktas, Emel; Roscoe, SamuelWe answer the question “How do companies develop and deploy supply chain structural ambidexterity to effectively manage geopolitical disruptions?” by investigating three significant geopolitical disruptions: Brexit, the US-China trade war, and the Covid-19 pandemic. We use an inductive theory-elaboration approach to build on Organisational Learning Theory and Dunning’s eclectic paradigm of international production. We conducted 29 elite interviews with senior supply chain executives across 14 multi-national manufacturing firms and validated the analysis by triangulating secondary data sources, including standard operating procedures, annual reports, and organizational protocols. When faced with significant geopolitical disruptions, companies develop and deploy supply chain structural ambidexterity by (1) developing parallel supply chains; (2) significantly reconfiguring their supplier networks, and (3) restructuring their internal sub-units. We contribute to Organisational Learning Theory and Dunning’s eclectic paradigm by empirically examining how companies reconfigure supply chains to pursue exploration and exploitation activities in response to geopolitical disruptions. During significant geopolitical disruptions, managers make decisions in tight timeframes. Therefore, we propose three types of supply chain structural ambidexterity based on the transition time available. We conclude with a managerial framework to assist firms in developing supply chain structural ambidexterity in response to geopolitical disruptions.Item Open Access Characterizing agile supply partnerships in the fashion industry(Emerald, 2016-10-31) Cerruti, Corrado; Mena, Carlos; Skipworth, Heather; Tavoletti, ErnestoPurpose – The purpose of this paper is to investigate high-involvement and short-term supply relationships, known as agile supply partnerships (ASPs), and explores the conditions that support the development of such inter-organizational relationships. Design/methodology/approach – A qualitative exploratory research design was followed, based on in-depth case studies of Italian fashion footwear manufacturers and their relationships with key suppliers. Findings – ASPs appear to be most relevant in supply material categories which have a high impact on the appearance or functionality of the product. Conversely, in supply categories with a low impact, long-term partnerships are preferred. Four main characteristics of ASPs are identified: they are part of a portfolio of relationships to balance the rigidities of long-term strategic partnerships; they have project-like features; they are developed from a network of pre-qualified suppliers; they are recurring and intermittent rather than continuous or isolated one-off short-term partnerships. Research limitations/implications – The research has been carried out in the context of an Italian footwear district. Further research is required to evaluate the validity of the propositions in other sectors and geographies. Practical implications – The research can help decision makers in the fashion industry, and potentially other sectors affected by high turbulence, to identify when ASPs are most appropriate and what characteristics they should have. Originality/value – This research contributes to the literature on agility by empirically evaluating the apparent paradox related to the specific characteristics of supply relationships required to foster an agile strategy and by clarifying the conditions under which fashion companies develop ASPs.Item Open Access The circularity of product-service systems: the role of macro-, meso- and micro-level contextual factors(Emerald, 2022-08-23) Kuhl, Carl-Christian; Skipworth, Heather; Bourlakis, Michael; Aktas, EmelPurpose: This paper aims to examine the relationships between macro-, meso-, and microlevel contextual factors that enable or inhibit the contribution of Product Service Systems (PSS) to circularity. It is informed by the Natural Resource-Based View (NRBV) and the multi-level perspective as theoretical lenses. Design/methodology/approach: A theory elaboration approach is used through three in-depth case studies of UK and German manufacturers. Case studies provide use- and result-oriented PSS for personal computers, power tools, and wind turbines. Multiple sources of evidence, including 20 semi-structured interviews, company documents, and quantitative data, are triangulated to improve the validity of the results. Findings: Empirical evidence for relationships between macro-, meso-, and micro-level contextual factors show significant barriers to the extending and cycling of resource loops, primarily through maintenance, repairs, and refurbishment. A firm’s environmental awareness has a determining role in the contribution of PSS to circularity. The evidence from two use-oriented PSS reveals different circularity maturity levels. Originality: This research makes three key contributions. Firstly, it elaborates on NRBV by showing that a firm’s environmental awareness determines product stewardship. The type of product stewardship practices depends on the enabling and inhibiting effects of macro- and meso-level factors. Secondly, it shows that use-oriented PSS have different circularity profiles and proposes three circularity maturity levels. Finally, it provides an empirically validated framework of macro-, meso-, and micro-level enablers and barriers and how they interact to enable or inhibit circularity in PSS.Item Open Access Data supporting the publication 'Product-service systems and circular supply chain practices in UK SMEs: The moderating effect of internal environmental orientation'(Cranfield University, 2022-04-19 16:54) Kuhl, Carl; Bourlakis, Michael; Aktas, Emel; Skipworth, HeatherData file 1. PSSandCSCinUK_JBR.csv Data are available under the terms of the Creative Commons Attribution 4.0 International (CC BY 4.0). Many studies uphold product-service systems (PSSs) as key factors for the implementation of circular supply chain (CSC) practices. This paper explores this assumption by testing the links between product-, use- and result-oriented PSSs and slowing, closing, and narrowing CSC practices. It develops and validates survey items that can be used to benchmark CSC practice implementation. In addition, it tests a model that recognises the positive moderating role of internal environmental orientation. A survey is conducted with 114 manufacturing small and medium-sized enterprises (SMEs) in the United Kingdom (UK). Partial least squares structural equation modelling is conducted to evaluate two models. The results show that product-oriented PSSs positively affect the slowing, use-oriented positively affects the closing, and result-oriented positively affects the slowing and the narrowing of resource loops. Internal environmental orientation does not moderate the PSS – CSC relationship, suggesting that less internally environmentally oriented firms are not at a disadvantage.Item Open Access Developing Supply Chain Strategy: Balancing Shareholder and Customer Value - A Management Guide(Cranfield University, 2007-01) Harrison, Alan; Godsell, Janet; Skipworth, Heather; Wong, Chee Yew; Julien, Denyse; Achimugu, NemileItem Open Access The effects of supply chain disruptions due to hurricanes on stock price.(Cranfield University, 2022-04) Schelp, Priscilla; Skipworth, Heather; Aktas, EmelPurpose and Rationale: It is known that supply chain disruptions have a negative stock price effect and that the effect is stronger if these are caused by catastrophes. However, these effects of hurricane-induced supply chain disruptions on stock price remain unexplored, even though the annual average hurricane damage in the US due to hurricanes is $54bn, of which $9bn is to commercial businesses. This thesis aims to: 1. Explore, classify and connect the three concepts of natural disasters, supply chain disruption (SCD) and firm financial performance in one framework. 2. Identify potentially influencing factors and test if, and in which way, these influence the effect of hurricanes on stock price. 3. Define a statistical model to evaluate the effect of hurricanes on stock price. The main focus is on manufacturing firms. Design/Methodology/Approach: This research is quantitative. The daily closing value of 625 manufacturing companies that were listed on the NYSE between 2014 and 2018 was analysed. Autoregressive Integrated Moving Average (ARIMA) was applied in combination with intervention analysis to model the stock price time series. In total six deduced hypotheses were tested. The statistical interruptions in stock prices due to hurricane announcements and hurricane incident announcements were investigated. The method allowed estimation of the magnitude and temporal patterns of change by applying transfer functions. Multiple factors that potentially influence the magnitude or pattern of the stock price reaction were tested, including details of damage. Findings: Both hurricane incident announcements and hurricane announcements negatively affect a firm’s stock price, mostly in the form of a transitory change. Industry moderates the stock price reaction to hurricane announcements. Minor supply chain disruptions are the only impacts resulting in a positive reaction. Providing details on actual damage leads to less negative and mostly positive reactions. Companies providing information on preventive closures are unlikely to suffer a negative reaction. Practical Implications: Hurricane risk needs to be actively managed by firms in all sectors; however, the preparation needs to be sector-specific. Firms should focus their efforts on managing supply chain disruptions. Additionally, firms need to communicate in a transparent way to reduce shareholders’ uncertainty and increase trust, so that the stock prices reactions are less negative. Originality: This thesis provides a single framework connecting disasters, supply chain disruptions and firm performance, thereby bridging supply chain management and financial economics literature. The thesis evaluates the effect of hurricane-induced supply chain disruptions for the first time. It does not analyse just the effect of hurricane incident announcements but also hurricane announcements and compares both. Autoregressive integrated moving average (ARIMA) in combination with an intervention model was applied as an alternative to the frequently used event study methodology. This approach is chosen to evaluate the effect of hurricane announcements and hurricane incident announcements on the daily stock price time series of the firms in scope. Longer term effects can be evaluated, and the best fitting transfer functions are assessed. The model accounts for autocorrelation, trend, seasonality, and drift patterns. Additionally, the effect of the following potentially influencing factors was tested as these have only been touched on in the existing literature so far: impact type, impact extent, detailed damage, and preventive closure.Item Open Access Exploring political risk in offshoring engagements(Taylor & Francis, 2016-12-22) Skipworth, HeatherThis research focuses on the analysis of political risk in the context of offshoring decisions. The study uses the Repertory Grid Technique, which entails a series of semi-structured interviews exploring key political risk experiences across offshoring engagements. The research extends the spectrum of political risk analysis in the context of offshoring engagements, and explores the varied impact of political risk across business activity types. The research identifies five key political risks affecting offshoring engagements and highlights the moderating effect of specific offshoring activity types Business Process Outsourcing, Information Technology Outsourcing or Knowledge Process Outsourcing on political risk implications. The research explores the conditioning effect of activity specific exposure to political risk and enhances the explanatory ability of the Transaction Cost Economics constructs, offering a novel operationalisation of the political risk component of external uncertainty. From a practical perspective, the research highlights the need for developing managerial tools to improve monitoring and identification of risks. The key practical contribution is the development of differentiated political risk typologies that can capture the nuances of external risks in offshoring, allowing for more accurate risk assessment of offshoring decisions.Item Open Access Exploring the imperative for purchasing strategic alignment to drive purchasing maturity(2017-07-05) Nonhoff, Britta; Skipworth, Heather; Bourlakis, Michael; Mena Madrazo, Carlos; Bernon, Michael; Reefke, HendrikThis study challenges purchasing literature on its lacking consideration of contextual factors, resulting in generic recommendations that oversimplify reality. Through a systematic review across purchasing maturity, purchasing strategic alignment and strategic purchasing literature, core conceptualisations are examined to understand underlying premises and the impact on performance links. This analysis highlights issues and unarticulated assumptions that limit the generalisability of any relationships with performance. The paper proposes a framework for future research that conceptualises alignment as a smaller gap between the current and target category maturity profile.Item Open Access Facing disruptive technologies: aligning purchasing maturity to contingencies(Emerald, 2018-12-03) Søgaard, Britta; Skipworth, Heather; Bourlakis, Michael; Mena, Carlos; Wilding, Richard D.Purpose This paper aims to explore how purchasing could respond to disruptive technologies by examining the assumptions underlying purchasing strategic alignment and purchasing maturity through a contingency lens. Design/methodology/approach This study uses a systematic review across purchasing maturity and purchasing strategic alignment literature. This is supplemented with exploratory case studies to include practitioners’ views. Findings This research demonstrates that neither purchasing maturity nor purchasing strategic alignment are suitable approaches to respond to disruptive technologies. Purchasing maturity does not allow purchasing managers to select relevant practices. It also shows no consideration of any contingencies, which practitioners highlight as important for the selection of practices. Purchasing strategic alignment includes the company strategy as a contingency but does not provide any practices to choose from. It does not include any other contextual contingencies considered important by practitioners. The findings indicate that linking the two research streams may provide a more suitable approach to responding to disruptive technologies. Research limitations/implications This research demonstrates the requirement to develop a new approach to responding to disruptive technologies, by linking purchasing maturity and purchasing strategic alignment to contextual contingencies. This is a currently unexplored approach in academic literature, which refutes the generally accepted premise that higher maturity unilaterally supports a better positioning towards technological disruption. This research also highlights a requirement for practitioners to shift their approach to “best practices”. Originality/value This is the first research to systematically review the relationships between purchasing maturity and purchasing strategic alignment. It adds to contingency theory by suggesting that purchasing maturity models can support the achievement of strategic alignment. Also, future research directions are suggested to explore these relationships.Item Open Access Geopolitical disruptions and supply chain structural ambidexterity(Emerald, 2024) Moradlou, Hamid; Skipworth, Heather; Bals, Lydia; Aktas, Emel; Roscoe, SamuelPurpose This paper seeks insights into how multinational enterprises restructure their global supply chains to manage the uncertainty caused by geopolitical disruptions. To answer this question, we investigate three significant geopolitical disruptions: Brexit, the US-China trade war and the coronavirus disease 2019 (Covid-19) pandemic. Design/methodology/approach The study uses an inductive theory-elaboration approach to build on Organisational Learning Theory and Dunning’s eclectic paradigm of international production. Twenty-nine expert interviews were conducted with senior supply chain executives across 14 multinational manufacturing firms. The analysis is validated by triangulating secondary data sources, including standard operating procedures, annual reports and organisational protocols. Findings We find that, when faced with significant geopolitical disruptions, companies develop and deploy supply chain structural ambidexterity in different ways. Specifically, during Covid-19, the US-China trade war and Brexit, companies developed and deployed three distinct types of supply chain structural ambidexterity through (1) partitioning internal subunits, (2) reconfiguring supplier networks and (3) creating parallel supply chains. Originality/value The findings contribute to Dunning’s eclectic paradigm by explaining how organisational ambidexterity is extended beyond firm boundaries and embedded in supply chains to mitigate uncertainty and gain exploration and exploitation benefits. During significant geopolitical disruptions, we find that managers make decisions in tight timeframes. Therefore, based on the transition time available, we propose three types of supply chain structural ambidexterity. We conclude with a managerial framework to assist firms in developing supply chain structural ambidexterity in response to geopolitical disruptions.Item Open Access Geopolitical disruptions and the manufacturing location decision in multinational company supply chains: a Delphi study on Brexit(Emerald, 2021-02-19) Moradlou, Hamid; Reefke, Hendrik; Skipworth, Heather; Roscoe, SamuelPurpose This study investigates the impact of geopolitical disruptions on the manufacturing supply chain (SC) location decision of managers in UK multinational firms. The context of study is the UK manufacturing sector and its response to the UK's decision to leave the European Union (EU), or Brexit. Design/methodology/approach The study adopts an abductive, theory elaboration approach and expands on Dunning's eclectic paradigm of international production. A Delphi study over four iterative rounds is conducted to gather and assess insights into manufacturing SC location issues related to Brexit. The panel consisted of 30 experts and managers from a range of key industries, consultancies, governmental organisations, and academia. The Delphi findings are triangulated using a focus group with 38 participants. Findings The findings indicate that the majority of companies planned or have relocated production facilities from the UK to the EU, and distribution centres (DCs) from the EU to the UK. This was because of market-seeking advantages (being close to major centres of demand, ease of access to local and international markets) and efficiency-seeking advantages (costs related to expected delays at ports, tariff and non-tariff barriers). Ownership and internalisation advantages, also suggested by the eclectic paradigm, did not play a role in the location decision. Originality/value The study elaborates on the OLI framework by showing that policy-related uncertainty is a primary influencing factor in the manufacturing location decision, outweighing the importance of uncertainty as an influencer of governance mode choices. The authors find that during geopolitical disruptions managers make location decisions in tight time-frames with incomplete and imperfect information, in situations of high perceived uncertainty. The study elaborates on the eclectic paradigm by explaining how managerial cognition and bounded rationality influence the manufacturing location decision-making process.Item Open Access How does servitisation affect supply chain circularity? – A systematic literature review(Emerald, 2019-09-13) Kühl, Carl; Bourlakis, Michael; Aktas, Emel; Skipworth, HeatherPurpose The purpose of this paper is to test the link between servitisation and circular economy by synthesising the effect of product-service systems (PSS) on supply chain circularity (SCC). Design/methodology/approach Following a systematic literature review methodology, the study identified 67 studies and synthesised them using content analysis. Findings A conceptual model is developed illustrating how PSS business models impact SCC through increased product longevity, closure of resource loops and resource efficiency. It also identifies six contextual factors affecting the implementation of SCC including: economic attractiveness of SCC; firm sustainability strategy; policy and societal environment; product category; supply chain relationships; and technology. Research limitations/implications The conceptual model proposes that SCC increases with servitisation. It also proposes that the main circularity effect stems from increased product longevity, followed by closed resource loops and finally resource efficiency. The model is deduced from the literature by using secondary data. Practical implications The review provides practitioners with a framework to increase SCC through PSS business models. It also gives insight into the various contextual factors that may affect how a manufacturer’s servitisation strategy contributes to SCC. Originality/value This review contributes to the understanding of the relationship between servitisation and SCC by synthesising the different effects that exist. Moreover, it creates new knowledge by identifying a range of contextual factors affecting the relationship between PSS and SCC.Item Open Access A Hybrid Approach for The Design of Facility Location and Supply Chain Network Under Supply and Demand Uncertainty: A Systematic Review(Cranfield University, 2009) Meeyai, Sutthipong; Skipworth, Heather; Palmer, AndrewIn today’s extremely competitive marketplace, firms are facing the need to meet or exceed increasing customer expectations while cutting costs to stay competitive in a global market. To develop competitive advantage in this business climate, companies must make informed decisions regarding their supply chain. In recent years, supply chain networks have received increasing attention among companies. The decision makers confront the network design problem in different situations. In order to make decisions, especially in strategic supply chain management, decision makers must have a holistic view of all the components. Supply chain network design, particular facility location problems, is one of the most complex strategic decision problems in supply chain management The aim of this dissertation is to make an inquiry about the facility location problems and related issues in supply chain and logistics management, and the use of modelling approaches to solve these problems. The methodology is to construct a review protocol by forming a review panel, and developing a detailed search strategy with clear inclusion and exclusion criteria. In addition, the measurement for evaluating the quality of studies is presented with a strategy for extracting data and synthesising the methodologies. The search results show the background of the facility location problems, the importance and the basic questions of these problems. The taxonomy of facility location problems with eighteen factors is presented. The basic static and deterministic problems in facility location including the covering, centre, median and fixed charge problems are discussed. Also, the extension of facility location problems comprises of location-allocation, multi-objective, hierarchical, hub, undesirable and competitive problems. In terms of uncertainty, dynamic, stochastic and robust facility location problems are presented. Finally, strengths and weaknesses of different modelling approaches are discussed; importantly, gaps from the review process are indentified. Recommendations of future research are described; and the facility location problem to be addressed by the proposed research is shown. In addition, contributions of the proposed facility location problem are illustrated.Item Open Access Implications of form postponement to manufacturing: a case study(Taylor & Francis, 2004-05-01T00:00:00Z) Skipworth, Heather; Harrison, AlanPostponement is an approach that helps to deliver more responsive supply chains. Form postponement involves the delay of final manufacturing until a customer order is received and is commonly regarded as an approach to mass customization. However, while much is written in the literature about the benefits and strategic impact of form postponement, little is still known about its application. This paper addresses how form postponement was applied in terms of its operational implications within a manufacturing facility through a retrospective study that tracked implementation of form postponement in a manufacturer of specialist high-voltage cabling equipment, called here 'ElectriCo'. The operational measures for products selected for form postponement were compared with those for products that continued to be made under make-to-order and make-to-stock regimes. Propositions were tested that addressed the operational implications of form postponement within the manufacturing facility, the impact of form postponement on selected performance metrics, and the demand profile for which form postponement was the preferred regime. Multiple data collection methods were used whereby documentary, archival and database evidence were used to measure operational characteristics across a broad front. The findings show that form postponement improved responsiveness but did not necessarily improve delivery reliability. The extent to which the order lead time can be reduced is dependent not only on the responsiveness of the postponed process, but also crucially on the responsiveness of the planning system. It was found that the problem of adapting the manufacturing planning and production scheduling systems at ElectriCo had been underestimated. This and other problems subsequently undermined the form postponement application and led to its eventual abandonment. The authors are undertaking further research of form postponement applications in different production contexts to provide further evidence for its operational implications.Item Open Access Implications of form postponement to manufacturing: a cross case comparison(Taylor & Francis, 2008-01-01T00:00:00Z) Skipworth, Heather; Harrison, AlanPostponement is an approach that helps to deliver more responsive supply chains. Form postponement involves the delay of final manufacturing until a customer order is received and is commonly regarded as an approach to mass customization. However, while much is written in the literature about the benefits and strategic impact of form postponement, little is still known about its application. This paper addresses how form postponement was applied in terms of its operational implications within a manufacturing facility through a retrospective study that tracked implementation of form postponement in a manufacturer of specialist high-voltage cabling equipment, called here 'ElectriCo'. The operational measures for products selected for form postponement were compared with those for products that continued to be made under make-to-order and make-to-stock regimes. Propositions were tested that addressed the operational implications of form postponement within the manufacturing facility, the impact of form postponement on selected performance metrics, and the demand profile for which form postponement was the preferred regime. Multiple data collection methods were used whereby documentary, archival and database evidence were used to measure operational characteristics across a broad front. The findings show that form postponement improved responsiveness but did not necessarily improve delivery reliability. The extent to which the order lead time can be reduced is dependent not only on the responsiveness of the postponed process, but also crucially on the responsiveness of the planning system. It was found that the problem of adapting the manufacturing planning and production scheduling systems at ElectriCo had been underestimated. This and other problems subsequently undermined the form postponement application and led to its eventual abandonment. The authors are undertaking further research of form postponement applications in different production contexts to provide further evidence for its operational implications.Item Open Access An investigation into heat dissipation from a stationary commercial vehicle disc brake in parked conditions.(Cranfield University, 2013-11) Stevens, Kevin; Tirovic, Marko; Skipworth, HeatherDetailed understanding of heat dissipation from a stationary disc brake is of considerable importance for vehicle safety. This is essential for both park braking on inclines and for preventing brake fluid boiling in hydraulic brakes. Despite the experience proving the significance of such conditions, there is very little published data dealing with this phenomenon, and even ECE Regulation 13 does not specify hot parking braking performance. The problem of heat dissipation from stationary brake may appear simplistic but it is actually more complex than from a rotating disc, due to the lack of symmetry through or a dominant mode of heat transfer as natural convection is the only driving force behind the airflow. All three heat transfer modes exist in a transient process, with complex heat transfer paths within and between brake components. This Thesis investigates the cooling performance of a Commercial Vehicle (CV) brake whilst in stationary conditions. The research is predominantly orientated towards the thermal aspects of Electric Parking Brake (EPB) application in CVs. Contraction of large brake components after hot parking may lead to vehicle rollaway on inclines, with tragic consequences. An extensive theoretical and experimental study was conducted. An analytical model of a disc brake in free air was developed, enabling good prediction of disc temperatures and average surface convective heat transfer coefficients (hcₒnv) over the entire cooling range. A comprehensive CFD modelling of the 3-dimensional flowfield around the disc brake was also conducted, as well as predicting the surface convection coefficient distribution. Shear Stress Turbulence model was found to be most suitable for such studies. FE models were created to predict temperatures in all components of the brake assembly. A special Thermal Rig was developed for experimental validations, which uses an induction heater for heating the disc brake, and numerous surface mounted and embedded thermocouples for measuring component temperatures, as well as ‘free standing’ for determining air temperatures in specific points. IR cameras provided further temperature field information. The results clearly show little influence of the conductive heat dissipation mode. The study also showed, for the experimental arrangement used, a constant value of surface emissivity (ɛ = 0.92). With well-defined conductive and radiative heat dissipation modes, the emphasis was placed on investigating convective heat dissipation from a stationary disc brake. It has been demonstrated that the anti-coning straight vane design of brake disc does not cool effectively in stationary conditions. Expected ‘chimney effects’ in disc vent channels do not materialise due to large scale recirculation regions preventing airflow from entering the channels, which drastically reduces the convective cooling. Complex thermal interactions between the large assembly components are explained, with typical cooling time being just over an hour for disc brake cooling from 400°C to 100°C. Extracted heat transfer coefficients were used for establishing a complex FE assembly model, which enables accurate prediction of temperatures of individual components over the entire cooling period. The developed approach is used for predicting temperature of the existing brake assembly but is equally suited for generating new designs with more favourable characteristics. In addition to being a powerful design tool for assisting in EPB design and validation process, the methodology developed offers wide applications, such as thermal optimisation of the caliper housing for the installation of continuous wear monitoring sensors, smart slack adjusters (for low friction drag brakes), etc. EPBs in passenger cars have been successfully used for over 10 years now. They use a relatively simple approach for ensuring safe parking from hot by over-clamping (applying approximately twice the required actuating force) and re-clamping (repeated application after the vehicle has been parked). Large CV actuating forces prevent the use of over-clamping as this could damage the disc, whilst re-clamping would need to be repeated several times over a much longer period of time, requiring the vehicle battery to power the electronic systems for a longer period of time without recharging. Neither approach is acceptable, requiring a more in- depth thermal study of the CV brake in stationary conditions, as investigated in this Thesis. In addition to technical, there are marketing and financial aspects which make EPB introduction and acceptance in commercial vehicles very different to passenger car applications. Such an investigation was conducted, exploring the market the CV EPB will be sold in and whether it would accept the new technology. Two questionnaire analyses were carried out, with the second giving the respondent detailed information about the EPB. It was found that using an informed, knowledge based approach yielded more positive feedback to the proposed product. The outcome may be even considered more contrary than expected, rather than instigating mistrust, the new CV EPB technology created interest. Furthermore, reports of pneumatic malfunction indicated that independence from the pneumatic system should be used as the key selling point for the EPB, for all beneficiary segments.Item Open Access An investigation of the mirroring of supply chain configuration modularity, and product modularity in contemporary supply chains(2018-03) Carr, John; Skipworth, HeatherThe introduction of new to market products is a challenge, in high technology markets, where speed and product variation are key considerations. High technology companies require the ability to simultaneously combine operational excellence, customer intimacy and product leadership. A lack of coordination between new product development (NPD), product planning and supply chain configuration (SCC) is a recognised cause of many early-life product failures. This research has one objective: to increase our understanding of the role of modularity in linking SCC and NPD decisions. The research incorporates general systems theory (GST) and knowledge-based theory (KBT), in mirroring product modularity (PM) and SCC modularity (SCCM) within contemporary supply networks. A systematic literature review (SLR) advocates the use of modular design, in linking these concepts and boosting the rate of innovation. The literature indicates that product architecture (PA) and SCC tend to be mirrored in modularity levels, post product launch, and this mirroring is desirable. The literature identified a gap in how SCCM is conceptualised, and how this mirroring manifests itself. These gaps are addressed in the empirical research conducted in project two, where the SCCM construct was developed and used to assess the manifestation and benefits of PM and SCCM mirroring across ten products (UoA) in five case companies across four industry sectors. Mirroring is evident, in six of the UoA, the remaining four UoA exhibit a medium level of mirroring, post product launch. The contribution to theory is a conceptualisation of SCCM where supply chain tiering is a main indicator. Propensity for modules to decouple; early supplier involvement, and a mirrored product and SCC life cycle perspective are the three causal linkages which enable mirroring of PM and SCCM post product launch. The SLR identified the use of co-development (CD), feedback (FC) and feedforward anticipatory control (FAC) at concept design to increase the mirroring of PM and SCCM, post product launch. In project three hypotheses were tested which advocate the use of these mechanisms, and the associated underlying mechanisms were investigated. The findings indicate use of CD and FAC, but a lack of FC, and mirroring support for platform design. The contribution to practice is an intervention framework applied at the concept stage that improves the coordination between NPD, SCC and product planning for new to market products.Item Open Access Logistics and procurement outsourcing in the healthcare sector: a comparative analysis(Elsevier, 2020-07-11) Skipworth, Heather; Delbufalo, Emanuela; Mena, CarlosAs outsourcing ventures become more complex, opportunities for synergies and efficiencies increase, but also create longer and more fragmented supply chains which could have disastrous consequences, particularly in a healthcare context. This study investigates the implications of outsourcing on healthcare supply chains by comparing two alternatives: outsourcing from public-to-private and outsourcing from public-to-public. A conceptual framework, adapted from previous literature, has been employed to provide a comprehensive overview of the phenomenon and consider the implications of logistics and procurement outsourcing on the healthcare supply chain structure and performance. The study presents a European cross-country comparison, analysing both the National Health Service (NHS) outsourcing in England (public-to-private outsourcing) and the Regional Health Service (RHS) outsourcing in the Tuscany region (Italy) (public-to-public outsourcing). Specificities and commonalities of the two outsourcing experiences provide suggestions for managers and policy-makers and enhance the current knowledge of outsourcing in the public healthcare sector.Item Open Access Managing supply chain uncertainty arising from geopolitical disruptions: evidence from the pharmaceutical industry and brexit(Emerald, 2020-05-05) Roscoe, Samuel; Skipworth, Heather; Aktas, Emel; Habib, FarooqPurpose This paper examines how firms of different sizes formulate and implement strategies to achieve fit with an external environment disrupted by a geopolitical event. The context of the study is the pharmaceutical industry and how it managed the supply chain uncertainty created by the United Kingdom's decision to leave the European Union, or Brexit. Design/methodology/approach Data were collected longitudinally from the pro-Brexit vote on 23 June 2016, until the UK’s departure from the EU on 31 January 2020. Twenty-seven interviews were conducted in the pharmaceutical sector, including nineteen interviews with senior managers at eight case companies and eight interviews with experts working for trade associations and standards institutes. The interview findings were triangulated with Brexit policy and strategy documentation. Findings When formulating strategy, multi-national enterprises (MNEs) used worst case assumptions, while large firms, and small and medium sized enterprises (SMEs) gathered knowledge as part of a “wait-and-see” strategy, allowing them to reduce perceptions of heightened supply chain uncertainty. Firms then implemented reactive and/or proactive strategies to mitigate supply chain risks. Originality/value The study elaborates on strategic contingency theory by identifying two important conditions for achieving strategic fit: first, companies deploy intangible resources, such as management time, to gather information and reduce perceptions of heightened supply chain uncertainty. Second, companies deploy tangible resources (supply chain redundancies, new supply chain assets) to lessen the negative outcomes of supply chain risks. Managers are provided with an empirical framework for mitigating supply chain uncertainty and risk originating from geopolitical disruptions.