Strategic sourcing:a combined QFD and AHP approach in manufacturing

Purpose – This paper aims to develop an integrated analytical approach, combining quality function deployment (QFD) and analytic hierarchy process (AHP) approach, to enhance the effectiveness of sourcing decisions. Design/methodology/approach – In the approach, QFD is used to translate the company stakeholder requirements into multiple evaluating factors for supplier selection, which are used to benchmark the suppliers. AHP is used to determine the importance of evaluating factors and preference of each supplier with respect to each selection criterion. Findings – The effectiveness of the proposed approach is demonstrated by applying it to a UK-based automobile manufacturing company. With QFD, the evaluating factors are related to the strategic intent of the company through the involvement of concerned stakeholders. This ensures successful strategic sourcing. The application of AHP ensures consistent supplier performance measurement using benchmarking approach. Research limitations/implications – The proposed integrated approach can be principally adopted in other decision-making scenarios for effective management of the supply chain. Practical implications – The proposed integrated approach can be used as a group-based decision support system for supplier selection, in which all relevant stakeholders are involved to identify various quantitative and qualitative evaluating criteria, and their importance. Originality/value – Various approaches that can deal with multiple and conflicting criteria have been adopted for the supplier selection. However, they fail to consider the impact of business objectives and the requirements of company stakeholders in the identification of evaluating criteria for strategic supplier selection. The proposed integrated approach outranks the conventional approaches to supplier selection and supplier performance measurement because the sourcing strategy and supplier selection are derived from the corporate/business strategy.

Managing risk in software development projects:a case study

Purpose - The main objective of the paper is to develop a risk management framework for software development projects from developers' perspective. Design/methodology/approach - This study uses a combined qualitative and quantitative technique with the active involvement of stakeholders in order to identify, analyze and respond to risks. The entire methodology has been explained using a case study on software development project in a public sector organization in Barbados. Findings - Analytical approach to managing risk in software development ensures effective delivery of projects to clients. Research limitations/implications - The proposed risk management framework has been applied to a single case. Practical implications - Software development projects are characterized by technical complexity, market and financial uncertainties and competent manpower availability. Therefore, successful project accomplishment depends on addressing those issues throughout the project phases. Effective risk management ensures the success of projects. Originality/value - There are several studies on managing risks in software development and information technology (IT) projects. Most of the studies identify and prioritize risks through empirical research in order to suggest mitigating measures. Although they are important to clients for future projects, these studies fail to provide any framework for risk management from software developers' perspective. Although a few studies introduced framework of risk management in software development, most of them are presented from clients' perspectives and very little effort has been made to integrate this with the software development cycle. As software developers absorb considerable amount of risks, an integrated framework for managing risks in software development from developers' perspective is needed. © Emerald Group Publishing Limited.

Contextualising accounts of illness:Notions of responsibility and blame in white and South Asian respondents' accounts of diabetes causation

We undertook a secondary analysis of in-depth interviews with white (n = 32) and Pakistani and Indian (n = 32) respondents who had type 2 diabetes, which explored their perceptions and understandings of disease causation. We observed subtle, but important, differences in the ways in which these respondent groups attributed responsibility and blame for developing the disease. Whereas Pakistani and Indian respondents tended to externalise responsibility, highlighting their life circumstances in general and/or their experiences of migrating to Britain in accounting for their diabetes (or the behaviours they saw as giving rise to it), white respondents, by contrast, tended to emphasise the role of their own lifestyle 'choices' and 'personal failings'. In seeking to understand these differences, we argue for a conceptual and analytical approach which embraces both micro- (i.e. everyday) and macro- (i.e. cultural) contextual factors and experiences. In so doing, we provide a critique of social scientific studies of lay accounts/understandings of health and illness. We suggest that greater attention needs to be paid to the research encounter (that is, to who is looking at whom and in what circumstances) to understand the different kinds of contexts researchers have highlighted in presenting and interpreting their data. © 2007 Foundation for the Sociology of Health & Illness/Blackwell Publishing Ltd.

The influence of cutting tool geometry upon aspects of chip flow and tool wear:a theoretical, three dimensional examination of the cutting geometry and the shape of the twist drill

This work is undertaken in the attempt to understand the processes at work at the cutting edge of the twist drill. Extensive drill life testing performed by the University has reinforced a survey of previously published information. This work demonstrated that there are two specific aspects of drilling which have not previously been explained comprehensively. The first concerns the interrelating of process data between differing drilling situations, There is no method currently available which allows the cutting geometry of drilling to be defined numerically so that such comparisons, where made, are purely subjective. Section one examines this problem by taking as an example a 4.5mm drill suitable for use with aluminium. This drill is examined using a prototype solid modelling program to explore how the required numerical information may be generated. The second aspect is the analysis of drill stiffness. What aspects of drill stiffness provide the very great difference in performance between short flute length, medium flute length and long flute length drills? These differences exist between drills of identical point geometry and the practical superiority of short drills has been known to shop floor drilling operatives since drilling was first introduced. This problem has been dismissed repeatedly as over complicated but section two provides a first approximation and shows that at least for smaller drills of 4. 5mm the effects are highly significant. Once the cutting action of the twist drill is defined geometrically there is a huge body of machinability data that becomes applicable to the drilling process. Work remains to interpret the very high inclination angles of the drill cutting process in terms of cutting forces and tool wear but aspects of drill design may already be looked at in new ways with the prospect of a more analytical approach rather than the present mix of experience and trial and error. Other problems are specific to the twist drill, such as the behaviour of the chips in the flute. It is now possible to predict the initial direction of chip flow leaving the drill cutting edge. For the future the parameters of further chip behaviour may also be explored within this geometric model.

Proteomic analysis of a noninvasive human model of acute inflammation and its resolution:the twenty-one day gingivitis model

The 21-day experimental gingivitis model, an established noninvasive model of inflammation in response to increasing bacterial accumulation in humans, is designed to enable the study of both the induction and resolution of inflammation. Here, we have analyzed gingival crevicular fluid, an oral fluid comprising a serum transudate and tissue exudates, by LC-MS/MS using Fourier transform ion cyclotron resonance mass spectrometry and iTRAQ isobaric mass tags, to establish meta-proteomic profiles of inflammation-induced changes in proteins in healthy young volunteers. Across the course of experimentally induced gingivitis, we identified 16 bacterial and 186 human proteins. Although abundances of the bacterial proteins identified did not vary temporally, Fusobacterium outer membrane proteins were detected. Fusobacterium species have previously been associated with periodontal health or disease. The human proteins identified spanned a wide range of compartments (both extracellular and intracellular) and functions, including serum proteins, proteins displaying antibacterial properties, and proteins with functions associated with cellular transcription, DNA binding, the cytoskeleton, cell adhesion, and cilia. PolySNAP3 clustering software was used in a multilayered analytical approach. Clusters of proteins that associated with changes to the clinical parameters included neuronal and synapse associated proteins.

Specialist business skills of international students

This paper follows on from that presented at the last BEST conference in Edinburgh (Higson & Hamilton-Jones(2004)). At that stage, the authors outlined their initial research work with students studying on the yearlong International Foundation programmes. at three local FE Colleges allied to Aston University. The research (funded by the University's Teaching Quality Enhancement Funds (TQEF) involved questionnaires and interviews with staff and students (the latter all from overseas). it aimed to identify ways to improve the learning experience of students on the International Foundation programmes, to aid their smooth transition to full degree programmes in Business and Management and to improve the progression rates of such students while studying at Aston. The initial research findings were used to design a module for those students' progress to degree programmes in Aston Business School. This paper discusses how the module was designed, its content and the assessment methods used to help determine whether students are achieving the learning outcomes. The basic principle was to identify areas of study where the International Foundation Programme students needed help in order to improve their learning styles to assist them with the requirements of other modules that they would be studying during their time at Aston. Particular emphasis was put on the need to develop active learners who were not disadvantaged by their lack of awareness of UK culture and society and who were as comfortable performing written work under examination conditions or presenting orally as their UK counterparts. An additional aim was to prepare these students for the placement year which was a compulsory part of their degree. The module, therefore, comprises a range of inputs for a number of staff, a company visit, weekly reflective learning leading to Personal Development Plan (PDP) work, formal examinations, presentations, group work •and individual case studies. This paper also reports on the initial reaction of the students and tutors to the new learning experience with currently 30 participants undertaking the module. Provisional findings suggest that the International Foundation programme has prepared the students well for degree-level work and that as a group of international students they are much more analytical and, after studying the module interactive than their counterparts who have come directly onto Aston degrees. It has shown them still to be quite passive learners, comfortable with facts and lecture-style learning environments, but less comfortable when asked to use their own initiatives. Continuing progress needs to be made in terms of encouraging them to develop a reflective approach to learning with the students taking some time to feel comfortable with an analytical approach to learning. In addition, im account of the students' reactions to having to work through a formal (PDP) and the results of their first assessments will be provided. At Aston, this work is being used as a pilot to recognise good practice with regards to work with further groups of international students. it is hoped that this would have widespread application across the sector.

Statistical model of OFDMA cellular networks uplink interference using lognormal distribution

In this letter, we propose an analytical approach to model uplink intercell interference (ICI) in hexagonal grid based orthogonal frequency division multiple access (OFMDA) cellular networks. The key idea is that the uplink ICI from individual cells is approximated with a lognormal distribution with statistical parameters being determined analytically. Accordingly, the aggregated uplink ICI is approximated with another lognormal distribution and its statistical parameters can be determined from those of individual cells using Fenton-Wilkson method. Analytic expressions of uplink ICI are derived with two traditional frequency reuse schemes, namely integer frequency reuse schemes with factor 1 (IFR-1) and factor 3 (IFR-3). Uplink fractional power control and lognormal shadowing are modeled. System performances in terms of signal to interference plus noise ratio (SINR) and spectrum efficiency are also derived. The proposed model has been validated by simulations. © 2013 IEEE.

Performance investigation of IEEE 802.11 MAC in multihop wireless networks

Medium access control (MAC) protocols have a large impact on the achievable system performance for wireless ad hoc networks. Because of the limitations of existing analytical models for ad hoc networks, many researchers have opted to study the impact of MAC protocols via discreteevent simulations. However, as the network scenarios, traffic patterns and physical layer techniques may change significantly, simulation alone is not efficient to get insights into the impacts of MAC protocols on system performance. In this paper, we analyze the performance of IEEE 802.11 distributed coordination function (DCF) in multihop network scenario. We are particularly interested in understanding how physical layer techniques may affect the MAC protocol performance. For this purpose, the features of interference range is studied and taken into account of the analytical model. Simulations with OPNET show the effectiveness of the proposed analytical approach. Copyright 2005 ACM.

Firm dynamics and job creation in the United Kingdom:1998–2013

This article is motivated by a very simple question – ‘what types of firms create the most jobs in the UK economy?’ One popular answer to this question has been High-Growth Firms (HGFs). These firms represent only a small minority – the ‘Vital 6%’ – of the UK business population yet, but have a disproportionate impact on job creation and innovation. We re-visit the discussion launched by the 2009 National Endowment for Science, Technology and the Arts (NESTA) reports, which identified the 6% figure and, using more recent data, confirm the headline conclusion for job creation: a small number of job-creating firms (mostly small firms) are responsible for a significant amount of net job creation in the United Kingdom. Adopting our alternative preferred analytical approach, which involves tracking the growth performance of cohorts of start-ups confirms this conclusion; however, we find an even smaller number of job-creating firms are responsible for a very significant proportion of job creation. We conclude by considering the question – ‘what are the implications for policy choices?’.

Lexico-grammatical portraits of vulnerable women in war:the 1641 depositions

The 1641 Depositions are testimonies collected from (mainly Protestant) witnesses documenting their experiences of the Irish uprising that began in October 1641. As news spread across Europe of the events unfolding in Ireland, reports of violence against women became central to the ideological construction of the barbarism of the Catholic rebels. Against a backdrop of women's subordination and firmly defined gender roles, this article investigates the representation of women in the Depositions, creating what we have termed "lexico-grammatical portraits" of particular categories of woman. In line with other research dealing with discursive constructions in seventeenth-century texts, a corpus-assisted discourse analytical approach is taken. Adopting the assumptions of Critical Discourse Analysis, the discussion is extended to what the findings reveal about representations of the roles of women, both in the reported events and in relation to the dehumanisation of the enemy in atrocity propaganda more generally. © John Benjamins Publishing Company.

Cramer-Rao bound analysis of location estimation in multi-hop wireless sensor networks

Location estimation is important for wireless sensor network (WSN) applications. In this paper we propose a Cramer-Rao Bound (CRB) based analytical approach for two centralized multi-hop localization algorithms to get insights into the error performance and its sensitivity to the distance measurement error, anchor node density and placement. The location estimation performance is compared with four distributed multi-hop localization algorithms by simulation to evaluate the efficiency of the proposed analytical approach. The numerical results demonstrate the complex tradeoff between the centralized and distributed localization algorithms on accuracy, complexity and communication overhead. Based on this analysis, an efficient and scalable performance evaluation tool can be designed for localization algorithms in large scale WSNs, where simulation-based evaluation approaches are impractical. © 2013 IEEE.

A copa do mundo FIFA na África do Sul/2010:como foi a experiência e o que podemos aprender com ela?

Neste ensaio pretendemos problematizar algumas lógicas sociais não explícitas que se articulam ao domínio de realização da Copa do Mundo FIFA. Para tanto, privilegiamos como recorte analítico a edição de 2010 deste evento, de modo a desvelarmos algumas das retóricas e ações estratégicas que permearam o contexto de sua realização na África do Sul. Com base em dados obtidos na literatura acadêmica e mídia, buscamos apresentar que as motivações para o evento se baseavam em discursos desenvolvimentistas por parte tanto da FIFA quanto das elites locais sul-africanas visando o convencimento e apoio por parte de diferentes grupos sociais. Entretanto, as consequências não foram necessariamente aquelas prometidas, sendo essas instituições as reais beneficiadas em seus interesses econômicos e políticos. Nesse ponto, argumentamos que a sociedade brasileira pode e deve aprender com essa experiência para avaliar de forma crítica os motivos menos aparentes de sediar eventos desse porte. In this essay, we intend to discuss some social logics not explicit that articulate the domain of the FIFA World Cup. Therefore, the 2010 edition of this event is used as analytical approach to reveal some of the rhetoric and strategic actions that permeated the context of its realization. Based on data obtained in the academic literature and media, we present that the motivations for the event were based on developmental discourses by both FIFA as well as local elites South African aiming to convince different social groups and conquer their support. However, the consequences are not necessarily those promised, and these institutions were the real beneficiaries in their economic and political mutual interests. At this point, we argue that Brazilian society can and should learn from the experience of South Africa to assess critically the motives less apparent to host such events.

Random graph coloring:Statistical physics approach

The problem of vertex coloring in random graphs is studied using methods of statistical physics and probability. Our analytical results are compared to those obtained by exact enumeration and Monte Carlo simulations. We critically discuss the merits and shortcomings of the various methods, and interpret the results obtained. We present an exact analytical expression for the two-coloring problem as well as general replica symmetric approximated solutions for the thermodynamics of the graph coloring problem with p colors and K-body edges. ©2002 The American Physical Society.

Managing healthcare performance in analytical framework

Purpose – The purpose of the paper is to develop an integrated framework for performance management of healthcare services. Design/methodology/approach – This study develops a performance management framework for healthcare services using a combined analytic hierarchy process (AHP) and logical framework (LOGFRAME). The framework is then applied to the intensive care units of three different hospitals in developing nations. Numerous focus group discussions were undertaken, involving experts from the specific area under investigation. Findings – The study reveals that a combination of outcome, structure and process-based critical success factors and a combined AHP and LOGFRAME-based performance management framework helps manage performance of healthcare services. Practical implications – The proposed framework could be practiced in hospital-based healthcare services. Originality/value – The conventional approaches to healthcare performance management are either outcome-based or process-based, which cannot reveal improvement measures appropriately in order to assure superior performance. Additionally, they lack planning, implementing and evaluating improvement projects that are identified from performance measurement. This study presents an integrated approach to performance measurement and implementing framework of improvement projects.