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Article
Publication date: 1 July 2000

Ina S. Markham, Richard G. Mathieu and Barry A. Wray

Determining the number of circulating kanban cards is important in order effectively to operate a just‐in‐time with kanban production system. While a number of techniques…

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Abstract

Determining the number of circulating kanban cards is important in order effectively to operate a just‐in‐time with kanban production system. While a number of techniques exist for setting the number of kanbans, artificial neural networks (ANNs) and classification and regression trees (CARTs) represent two practical approaches with special capabilities for operationalizing the kanban setting problem. This paper provides a comparison of ANNs with CART for setting the number of kanbans in a dynamically varying production environment. Our results show that both methods are comparable in terms of accuracy and response speed, but that CARTs have advantages in terms of explainability and development speed. The paper concludes with a discussion of the implications of using these techniques in an operational setting.

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Integrated Manufacturing Systems, vol. 11 no. 4
Type: Research Article
ISSN: 0957-6061

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Article
Publication date: 21 November 2008

Barry Wray and Richard Mathieu

The purpose of this paper is to develop and test a model of the relative performance of open source software (OSS) projects.

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1471

Abstract

Purpose

The purpose of this paper is to develop and test a model of the relative performance of open source software (OSS) projects.

Design/methodology/approach

This paper evaluates the relative performance of OSS projects by evaluating multiple project inputs and multiple project outputs by using a data envelopment analysis (DEA) model. The DEA model produces an efficiency score for each project based on project inputs and outputs. The method of producing an efficiency score is based on the convex envelopment technology structure. The efficiency measure quantifies a “distance” to an efficient frontier.

Findings

The DEA model produced an index of corresponding intensities linking an inefficient project to its benchmark efficient project(s). The inefficiency measures produced an ordering of inefficient projects. Eight projects were found to be “efficient” and used as benchmarking projects.

Research limitations/implications

This research is limited to only security‐based OSS projects. Future research on other areas of OSS projects is warranted.

Practical implications

The result of this research is a practical model that can be used by OSS project developers to evaluate the relative performance of their projects and make resource decisions.

Originality/value

This research extends the work of previous studies that have examined the relative performance of software development projects in a traditional development environment. As a result of this research, OSS projects can now be adequately benchmarked and evaluated according to project performance. An OSS project manger can effectively use these results to critically evaluate resources for their project and judge the relative efficiency of the resources.

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Information Management & Computer Security, vol. 16 no. 5
Type: Research Article
ISSN: 0968-5227

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Article
Publication date: 1 October 1994

Barry Wray, Adrian Palmer and David Bejou

Conceptual arguments favouring a relational rather than a transactionalapproach to the study of buyer‐seller relationships are now wellunderstood. However, attempts to…

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3154

Abstract

Conceptual arguments favouring a relational rather than a transactional approach to the study of buyer‐seller relationships are now well understood. However, attempts to quantify the factors contributing towards relationship quality have been held back by the complexity of the underlying factors and their interrelatedness. Traditional regression techniques are not effective in analysing data with high levels of multi‐collinearity and missing information, typical in many studies of buyer behaviour. Makes use of a relatively new technique – neural network analysis – to try to quantify the factors contributing to buyer‐seller relationship quality. The technique uses a statistically‐based learning procedure modelled on the workings of the human brain which quantifies the relationship between input and output variables through an intermediate “hidden” variable level analogous to the brain. For this study, a neural network was developed with two outcome components of relationship quality (relationship satisfaction and trust), and five input antecedents (the salesperson′s sales orientation, customer orientation, expertise, ethics and the relationship′s duration). In a comparison of multiple regression and neural network techniques, the latter was found to give statistically more significant outcomes. New applications within marketing for neural network analysis are being found. Contributes towards the development of the technique and suggests a number of further possible applications.

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European Journal of Marketing, vol. 28 no. 10
Type: Research Article
ISSN: 0309-0566

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Article
Publication date: 1 June 1978

Mr John Reeves has become product manager with Burrell Colours Ltd at Burrell House, 44 Broadway, London E15 1XN.

Abstract

Mr John Reeves has become product manager with Burrell Colours Ltd at Burrell House, 44 Broadway, London E15 1XN.

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Pigment & Resin Technology, vol. 7 no. 6
Type: Research Article
ISSN: 0369-9420

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Abstract

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Special Edition: Financial Crisis - Environmental Crisis: What is the Link?
Type: Book
ISBN: 978-1-78052-670-6

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Article
Publication date: 11 May 2015

Lynn Sudbury-Riley, Florian Kohlbacher and Agnes Hofmeister

The purpose of this paper is to investigate self-perceived age among Baby Boomers in the UK, Germany, Japan, and Hungary, and identifies two horizontal segments based on…

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2083

Abstract

Purpose

The purpose of this paper is to investigate self-perceived age among Baby Boomers in the UK, Germany, Japan, and Hungary, and identifies two horizontal segments based on the way consumers view their age.

Design/methodology/approach

Questionnaires were used to sample 880 Baby Boomers. Structural equation modeling is used to investigate multinational measurement invariance of the cognitive age scale.

Findings

Two distinct segments are identified, providing support for a young-at-heart consumer culture in all nations in the study. Results also find cognitive age to exhibit partial measurement invariance, which is expected given the disparate nations under study.

Research limitations/implications

This research contributes to cross-cultural global age research which is still in an early pioneering stage. The study builds on a small number of previous studies that validate cognitive age, extends current knowledge of the measurement properties of cognitive age, and identifies two distinct international segments of Baby Boomers. Further research needs to delve into the antecedents of self-perceived age, particularly in the ways in which different life experiences and cultures may impact age identities.

Practical implications

The study has implications for marketing managers wishing to target the increasingly important young-at-heart Baby Boomer.

Originality/value

The study uses four non-American countries, uses samples matched for chronological age, and does not use convenience samples, which make it unique in the cognitive age literature. The study has value for marketing managers, global age researchers, and consumer culture researchers.

Details

International Marketing Review, vol. 32 no. 3/4
Type: Research Article
ISSN: 0265-1335

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Article
Publication date: 1 November 1915

At a recent meeting of the Glasgow Grocers' and Provision Merchants' Association, it was alleged that there are provision merchants in Glasgow who are doing a large…

Abstract

At a recent meeting of the Glasgow Grocers' and Provision Merchants' Association, it was alleged that there are provision merchants in Glasgow who are doing a large business in selling margarine as butter at 1s. 2d. per pound. In commenting upon this statement The Grocer very properly urges that the officials of the Association referred to should take prompt steps to place the facts in their possession before the Glasgow authorities and their officers, and observes that in certain cities and towns—Birmingham, for example—the grocers' associations have co‐operated with the authorities in their efforts to suppress illegal trading, particularly in regard to the sale of margarine as butter. It appears that one of the members of the Glasgow Association expressed the opinion that the Margarine Act has been a failure and that shopkeepers who sell margarine as butter should be charged with obtaining money under false pretences.

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British Food Journal, vol. 17 no. 11
Type: Research Article
ISSN: 0007-070X

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Article
Publication date: 1 December 1911

With regard to all mammals it may safely be assumed that, unless in very exceptional cases, the best food for the young animal is the natural milk secreted during…

Abstract

With regard to all mammals it may safely be assumed that, unless in very exceptional cases, the best food for the young animal is the natural milk secreted during lactation by the healthy adult female of the same species, and that any other food, however similar in chemical composition, is likely to yield less satisfactory results as regards the health and power of resistance to disease of the suckling.

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British Food Journal, vol. 13 no. 12
Type: Research Article
ISSN: 0007-070X

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Article
Publication date: 1 November 1914

That the health of the body is very closely connected with the nature and quantity of the food we take is a statement in the nature of a self‐evident proposition. When we…

Abstract

That the health of the body is very closely connected with the nature and quantity of the food we take is a statement in the nature of a self‐evident proposition. When we desist from eating food, starvation sets in after a longer or shorter period, according to the individual; when we eat too much or drink too much, distressing symptoms as inevitably supervene. Moreover, the quantity of food or drink consumed is not the only factor. The quality also is a matter of supreme importance, as in cases of malnutrition, while the various forms of blood disease, more or less loosely classed together as anæmia, appear to be associated to some extent with the question of nourishment. Without going so far as extreme partisans do who would seek to prove that all diseases are ultimately due to the consumption of unsuitable food, as witness, for instance, the views of the more advanced vegetarians and fruitarians, who attribute cancer and other maladies to the eating of meat, it is obvious that a very close connection exists between the health of the body and the nature of our food supply.

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British Food Journal, vol. 16 no. 11
Type: Research Article
ISSN: 0007-070X

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Article
Publication date: 1 September 2000

Jonathan C. Morris

Looks at the 2000 Employment Research Unit Annual Conference held at the University of Cardiff in Wales on 6/7 September 2000. Spotlights the 76 or so presentations within…

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Abstract

Looks at the 2000 Employment Research Unit Annual Conference held at the University of Cardiff in Wales on 6/7 September 2000. Spotlights the 76 or so presentations within and shows that these are in many, differing, areas across management research from: retail finance; precarious jobs and decisions; methodological lessons from feminism; call centre experience and disability discrimination. These and all points east and west are covered and laid out in a simple, abstract style, including, where applicable, references, endnotes and bibliography in an easy‐to‐follow manner. Summarizes each paper and also gives conclusions where needed, in a comfortable modern format.

Details

Management Research News, vol. 23 no. 9/10/11
Type: Research Article
ISSN: 0140-9174

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