摘要:

Many studies involving the estimation of the start-up parameters for process tasks have been carried out in the past, using different learning curve models. The time constant learning curve has recently been successfully applied to both short cycle speed skill assembly tasks and to long cycle process tasks. Satisfactory prediction of average performance has been achieved enabling management to improve production schedules, reduce costs and evaluate training programmes. In this particular process being studied the modelling of average performance has been carried out following established procedures.

ISSN:0020-7543    

DOI:10.1080/00207548008919679

出版商:Taylor & Francis Group    

年代:1980

数据来源: Taylor

摘要:

This paper reports development activities for a new production management system aiming to obtain excellent product quality and high productivity by heightening the morale of the workers and by harmonizing the workers' human needs with the company's organizational needs

ISSN:0020-7543    

DOI:10.1080/00207548008919680

出版商:Taylor & Francis Group    

年代:1980

数据来源: Taylor

摘要:

This paper presents some quantitative measures of job variety based on entropy statistics of information theory and on a modification of the Turner-Lawrence measure. By means of the psychophysical scaling technique of magnitude estimation, subjective judgements of variety for a number of different job situations were obtained from a total of 42 subjects. Power models or linear models between perceived variety and its physical correlates were found to explain up to 99% of the variation in perceived variety. Since job variety is generally considered to have a significant influence on motivation and job satisfaction, such quantitative models may possess practical utility for job design and for systematic programmes of job enlargement or enrichment.

ISSN:0020-7543    

DOI:10.1080/00207548008919681

出版商:Taylor & Francis Group    

年代:1980

数据来源: Taylor

摘要:

Effective production scheduling is a major need of all large industrial plants. Hierarchical computer control offers a unique opportunity to develop such a facility since it is the one method by which present plant status of all production units can be correlated with sales needs in real-time.

ISSN:0020-7543    

DOI:10.1080/00207548008919682

出版商:Taylor & Francis Group    

年代:1980

数据来源: Taylor

摘要:

Decision-making on lay-out demands consideration of numerous criteria. This paper considers the most important of them and divides them into three groups: limiting, mutually influencing and marginal conditions. Because of the different criteria, we also need different approaches to the various problems. Many possible ways of solving lay-out problems are shown schematically

ISSN:0020-7543    

DOI:10.1080/00207548008919683

出版商:Taylor & Francis Group    

年代:1980

数据来源: Taylor

摘要:

This paper describes an approach to the optimization of heuristic scheduling in batch and jobbing manufacture. The approach is based upon the use of a composite weighted priority index to resolve conflicts between operations in order to meet a predefined management objective function. The effects of combined despatching parameters in the priority index are investigated and examples are given of the resulting response surfaces. Using the techniques of harmonic analysis a model of the underlying surface trend is identified and used to predict the location of optimal schedules. Typical experimental results are presented which suggest that the proposed method compares favourably with traditional scheduling techniques.

ISSN:0020-7543    

DOI:10.1080/00207548008919684

出版商:Taylor & Francis Group    

年代:1980

数据来源: Taylor

摘要:

This paper presents a general solution to ordered-entry multichannel queueing systems. The solution provides both steady-state and transient results for such systems. The transient behaviour under different conditions is studied.

ISSN:0020-7543    

DOI:10.1080/00207548008919685

出版商:Taylor & Francis Group    

年代:1980

数据来源: Taylor

摘要:

In production flow analysis, routings are the basic data from which interrelations between operations in a functionally structured production system may be found.

ISSN:0020-7543    

DOI:10.1080/00207548008919686

出版商:Taylor & Francis Group    

年代:1980

数据来源: Taylor

摘要:

In this paper we treat the optimum ordering policy, in which when an ordered spare is delivered, it can be put into inventory until a prespecified time if the original unit is still operating. We apply the expected total discounted cost as a criterion of optimality, introducing, with an exponential discount rate, two types of lead times and several costs. It is shown that under certain conditions there exist optimum ordering policies minimizing that expected cost. Finally, the results in this paper include those in an earlier paper by Kaio and Osaki (1978) as special cases.

ISSN:0020-7543    

DOI:10.1080/00207548008919687

出版商:Taylor & Francis Group    

年代:1980

数据来源: Taylor