Toward a continuum of measurement scales in Just-in-Time (JIT) research – an examination of the predictive validity of single-item and multiple-item measures

We compare the predictive validity of single-item and multiple-item measures utilized in Just-in-Time (JIT) research. The study examines if single-item measures could be used for some of the JIT practices, especially if the object of inquiry is concrete singular and if the attribute to be researched is concrete. Arguments are developed for the concrete nature of the JIT practice of “set-up time reduction” and we examine the ability of a single-item measure of this variable to predict the criterion variable (delivery performance). In addition, the study also examines the efficacy of using multiple-item measures for variables that are abstract in nature, and thereby attempts to develop a continuum of JIT constructs ranging from concrete to abstract. The results obtained by analyzing two sets of survey data show that multiple-item measures are not necessarily more valid than single-item measures for all constructs. The findings provide evidence that multiple-item measures and single-item measures for scale development should be contingent upon the nature of constructs. For concrete constructs, single-item measures are as valid as multi-item measures. Meanwhile, for abstract constructs it is important to ensure that multiple items are considered to capture the multi-dimensional nature of these constructs. Results also reveal that JIT practices display significant differences in terms of abstract/concrete perceptions. The paper presents theoretical and practical implications of the findings, and offers directions for future research.     

Relationship between just-in-time manufacturing practices and performance: A meta-analytic investigation

Just-in-time (JIT) manufacturing is among the most commonly researched topics in the area of operations management. This study examines the relationship between JIT manufacturing practices and performance outcomes by means of meta-analysis of correlations approach. Based on an in-depth analysis of literature spanning from 1992 to 2008, the results of this meta-analytic investigation support a positive relationship between JIT manufacturing practices and aggregate performance. However, the findings suggest that not all individual JIT practices are associated with all types of performance outcomes. This study highlights the JIT practices that have the greatest impact on individual performance outcomes and emphasizes the role of moderating factors in the relationship between JIT practices and performance. Theoretical and managerial implications are discussed and directions for future theory building in JIT are presented.     

Managing inventories for maximum benefit.

In many companies it is not feasible to go to just-in-time (JIT) inventory management practices. In these instances, an aggressive inventory-monitoring program is a must. This article describes a program that resulted in a 75-percent reduction of inventory over a five-year interval. The topics covered will be applicable to those companies where JIT is not the answer.     

HR managers’ talent philosophies: prevalence and relationships with perceived talent management practices

Abstract

HR managers have different beliefs about the nature, value, and instrumentality of talent—referred to as ‘talent philosophies’. In line with cognitive psychology, we reason that talent philosophies are similar to mental models that influence how HR managers interpret and use talent management (TM) practices within their organizations. In this article, we explore the prevalence of four different talent philosophies (exclusive/stable; exclusive/developable; inclusive/stable; inclusive/developable) in a sample of 321?HR managers. We then explore how talent philosophies relate to organizational context (i.e. size, ownership form, multinational orientation) as well as to HR managers’ perceptions of their organization’s TM practices. Cluster analysis corroborated the presence of the four talent philosophies in our dataset. All four talent philosophies were represented almost equally often in the overall dataset. Organizational size was found to be related to talent philosophies, such that HR managers who worked in smaller organizations were more likely to hold an inclusive talent philosophy. We also found support for the relationship between talent philosophies and perceptions of the exclusiveness or inclusiveness of the organization’s definition of talent, and its degree of workforce differentiation. Contrary to expectations, results did not support a link between talent philosophies and perceived talent identification criteria.     

JIT采购方式对公司净现值的影响

本文通过分析比较JIT采购方式与传统采购方式的不同,得出JIT采购方式的优点,并得出其对公司净现值增值的积极影响。原料采购是企业全部经营活动的起点,这一环节对企业整体经营活动效率的提高非常重要。JIT采购方式是上世纪七十年代由日本丰田集团创造的一种新型的管理方法,在西方发达国家受到了普遍重视,并在实践中取得了良好的效果。目前我国有很多企业正逐步意识到这种管理方法的先进性,并开始把这种管理思想应用到企业价值链的各个环节中去。由净现值公式NPV=-C+PV,我们可以得出JIT采购方式通过使企业最大限度地降低成本,使企业净现值增加,使企业价值增值。     

基于JIT的制造商供应链优化模型

JIT思想的主旨是强调生产的无库存与准时,围绕这一思想,将运输商作为供应链上的独立成员,考虑运输商的运输能力、供应商的供应能力、销售商的销售数量等约束以及运输环节诸因素的作用,建立了JIT环境下制造商供应链的优化模型,以实现制造商经营活动的优化,并通过具体的实例说明模型的可行性。     

Assessing the impact of JIT using economic theory

This paper combines ideas that are well founded in the production and inventory management literature, with analytical approaches that have been long established in the economic theory literature, to reveal and explore production-function characteristic differences between JIT producers and non-JIT producers among electronic firms in Ontario, Canada. The methodology employed is the estimation of the CES-TL total cost system. Our primary conclusion is that JIT firms are more cost-efficient and appear to be distinct from the non-JIT group. This conclusion is supported by: (1) the fact that, in most cases, the elasticities calculated from the two groups of firms are significantly different; (2) the fact that the cost elasticity with respect to output is lower for the JIT firms than for the non-JIT firms, indicating that the former are better able to capture economies of scale and density; (3) the difference between the elasticities of factor productivity, with respect to output changes, shows the JIT firms as being more labor- and materials-saving than the non-JIT firms.     

An examination of the literature relating to issues affecting the human variable in just-in-time environments

There has been an extensive body of research conducted into the technical aspects of the just-in-time (JIT) manufacturing methodology, particularly prior to 1990. It is only in more recent times that the focus has turned toward the more subtle people-related aspects. The recognition of JIT as a truly holistic approach to managing manufacturing operations has led to an appreciation of the importance of the role played by the human variable as well as an emphasis on the impact that organisational structure and management style can have on successful operation. This article examines and analyses the content of a wide range of articles related to issues such as: the need for change in corporate culture, the role of organisational structures, factors significantly impacting chances of success, the importance of employee involvement, how best to involve employees, the importance of training, how/whom/when to train, different team-based organisational structures, the impact of changing roles on various levels of the organisation and the appropriateness of particular change management strategies. An overall picture of the current state of thinking on these issues is thus developed and the importance of these factors to the successful implementation and operation of JIT highlighted. Opportunities for further research in this important area are identified.     

JIT现场管理特点分析

JIT(Just In Time)是由日本丰田汽车公司独创的一种生产方式。现已在欧美企业中推行开来,并产生了巨大的经济效益。而我国的众多企业在引进这种先进的生产方式时,由于没有把握其精髓,盲目实施,导致了失败。对JIT现场管理特点进行分析,目的是帮助企业正确认识、实施JIT。     

JIT生产方式及其应用策略

简要介绍了JIT生方式的基本原理及本质特征,分析了JIT生产方式给予我们的启示及我国一些企业在应用中存在的主要问题,认为JIT的思想精髓就是持续改进,不断完善,彻底杜绝浪费。据此提出了我国企业学习借鉴的策略:关性是彻底转变观念,强调打好基础,坚持持续改善,依托工业工程开发企业自己的JIT生产模式。     

Management initiatives and just-in-time manufacturing

Numerous benefits have been claimed for firms that implement just-in-time (JIT) approaches to manufacturing. While a fair number of Western firms have been successful at such implementations, other firms that could benefit appear to be addressing only a few features rather than the overall philosophy and system. This paper considers whether each of a number of management initiatives is necessary for the implementation of just-in-time manufacturing. A case-based research methodology was used for theory testing at six plants, each which claimed to be implementing just-in-time manufacturing. Data were obtained via interviews, questionnaires, direct observation, and collection of documents. Of six management initiatives considered, four were supported as necessary conditions for both JIT flow and JIT quality, as well as for employee involvement. These four are: (1) promotion of employee responsibility, (2) provision of training, (3) promotion of teamwork, and (4) demonstration of visible commitment. The other two management initiatives were rejected as necessary conditions. These are: (1) provision of workforce security, and (2) use of group performance measures. The results also indicated that employee involvement plays a central role in JIT implementation.     

Who promotes a value‐in‐diversity perspective? A fuzzy set analysis of executives’ individual and organizational characteristics

Diversity perspectives are philosophies of or approaches to diversity held by organizations, groups, or executives. They are important for organizations because they can determine the success or failure of diversity in the workforce. However, little is known about the predictors of diversity perspectives among executives. Using fuzzy set qualitative comparative analysis, we analyzed 50 interviews with top executives in Germany to identify individual and organizational characteristics that predict executives' adoption of a diversity perspective, in particular of a value‐in‐diversity perspective. Specifically, we analyzed gender, age, education level, vocational background, and tenure (individual characteristics), as well as size, sector of organization, and competitive environment (organizational characteristics), as potential predictors. We found single characteristics did not predict adoption, but configurations of characteristics did. Drawing on the person‐situation‐interactionist perspective, we developed specific profiles of executives likely to foster a value‐in‐diversity perspective and identified characteristics of their work environments that support such an approach. Theoretical and practical implications are discussed.     

基于JIT的水电工程物流质量管理研究

文章基于JIT在水电物流质量管理的创新性应用,树立JIT思想观念,实施实时化物流管理,创建水电工程物流“拉动”式管理机制,从而达到追求零库存、零缺陷、零浪费和降低成本的目的。     

The impact of just-in-time manufacturing on firm performance in the US

Just-In-Time manufacturing has been subjected to numerous studies both empirical and methodological. This work attempts to measure the impact of JIT on accounting measures of performance. Most technologies and investments are justified on the basis of their impact on financial and accounting measures which are not easily quantified. Our empirical methodology, simultaneous equation estimation, allows us to isolate the partial effects of JIT on various accounting measures thus gauging the true impact of this method on firm performance. Our results show that after JIT adoption firms reduced the labor content in facilities, increased inventory turnover and enhanced earnings. There was no significant impact on prices charged by the firm. These results support the anecdotal evidence on JIT and the theoretical work done by various authors. Even though the firms studied experienced a downturn in their performance our empirical methodology could identify positive benefits resulting from JIT adoption.     

Top-down Production Management: A Recent Trend in the Japanese Productivity-enhancement Movement

It is well known that many of the manufacturing practices advanced in Japan in the 1970s and 1980s emphasize bottom-up decision processes characterized by teams, the empowerment of multi-skilled workers on the shopfloor, demand-pull and horizontal decision mechanisms. These practices include Just-in-Time (JIT) and quality management practices such as quality circles (QC) and total quality management (TQM). While these practices continue to be effective under appropriate circumstances, the drastic appreciation of the Japanese yen that has taken place since the mid-1980s and the prolonged recession following the burst of the bubble have forced many Japanese manufacturers to adopt new methods to improve their production efficiency. In this paper we discuss one of such methods called Total Productivity Management (TPM). Unlike JIT or TQM, implementing TPM requires a top-down approach. TPM provides direct connections between corporate-wide objectives such as the overall cost reduction and shopfloor practices. It is possible that TPM has contributed significantly to Japanese manufacturers' recent success in reducing their cost of operation. © 1997 John Wiley & Sons, Ltd.     

International best practice,quality management anf high performance: inferences from the Australian automotive sector

The adoption of international ‘best practice’ (IBP) has been presented widely as a strategy for organizations to improve productivity and competitiveness. The most prominent best practices include total quality management, continuous improvement programmes and just-in-time (JIT) production. Two key measures of competitiveness are quality and efficiency, and we examine those IBPs that lead to high levels of quality and efficiency in the Australian automotive industry. Our findings are based on a survey of the Australian automotive industry, and they suggest that the successful implementation of JIT and continuous improvement programmes can influence efficiency; this corresponds with recent discussions of IBP. However, our analyses also indicate that certain areas of human resource management, such as performance appraisals, performance-related pay, welfare schemes and testing during selection, can have an important influence on efficiency and quality and should also be considered as important forms of best practice.     

存货管理新思维：从EOQ到JIT

文章介绍了两种存货管理方法──经济订货批量（ＥＯＱ）和准时制（ＪＩＴ），通过比较分析，认为ＪＩＴ是存货管理思想的进步与发展，将更适合于现代企业的存货管理。     

Interrelationships among lean bundles and their effects on operational performance

The aim of our research is to disentangle the complex relations among lean bundles and operational performance. In particular, we focus on the direct and mediating effects on operational performance of three of the main lean manufacturing bundles, namely Just in Time (JIT), Total Quality Management (TQM) and Human Resource Management (HRM). We run statistical analysis on the High Performance Manufacturing round III database, a survey involving 266 plants in nine countries across three different industries. Our results show that JIT and TQM have a direct and positive effect on operational performance while HRM has a mediated effect on it. Theoretical and managerial implications of our findings are then drawn and discussed.