摘要:

A conveyor system consists of equally-spaced hooks passing before a number of work stations. The work-pieces (units) are processed by the first available work station, after which they are transferred to a separate system. When the processing times are independently and exponentially distributed, distributions of the inter-arrival times of units at the work stations are found and it is shown that the incidence of missed units is minimized if the operatives are placed in descending order of work rate along the conveyor.

ISSN:0020-7543    

DOI:10.1080/00207547508942970

出版商:Taylor & Francis Group    

年代:1975

数据来源: Taylor

摘要:

Several approximate continuous review, trigger point-reorder quantity models, differing in degree of complexity, are compared and evaluated under varying conditions. Their performances are compared to those of an exact model, under the assumption of Poisson demand. The approximate models studied are (1) an economic order quantity (EOQ) analysis for determining the order quantity and a periodic review analysis of the “ newsboy ” type to set the reorder (trigger) point (2) a model which considers reorder point and order quantity interactions as developed by Hadley and Whitin ; and (3) a theoretically more accurate variation of the Hadley and Whitin model as given by Wagner.

ISSN:0020-7543    

DOI:10.1080/00207547508942971

出版商:Taylor & Francis Group    

年代:1975

数据来源: Taylor

摘要:

Several algorithms have been presented for handling complex scheduling problems. These methods are computationally impractical when confronted with large problems. New algorithms have been developed for solving job-shop problems. They are more efficient than the previous ones because they use dominance and better bound ideas. The purpose of this paper is to present an efficient algorithm for complex scheduling problems generalizing those ideas.

ISSN:0020-7543    

DOI:10.1080/00207547508942972

出版商:Taylor & Francis Group    

年代:1975

数据来源: Taylor

摘要:

A considerable amount of research has been conducted into the use of decision rules for scheduling in the job-shop environment. The research discussed in this paper is of a similar nature but concerned with the use of rules for controlling the service operation to semi-automatic machines where, the. run times and service times are, in the main, deterministic. The set of rules studied is different to those of the job-shop scheduling problem since the. products are manufactured, under batch conditions. Producing for stock means that delivering dates are not important but the idle time of machines is very important.

ISSN:0020-7543    

DOI:10.1080/00207547508942973

出版商:Taylor & Francis Group    

年代:1975

数据来源: Taylor

摘要:

A problem of scheduling the production of pharmaceuticals in a limited number of vessels is presented. It has the characteristics of sequence dependent changeover times, multi-stage production, parallel usage of vessels and flexibility in the choice of vessels. An optimizing procedure is discussed, but dismissed as computationally infeasible. Consequently, a heuristic is developed, and its performance evaluated. Typical results are also reported.

ISSN:0020-7543    

DOI:10.1080/00207547508942974

出版商:Taylor & Francis Group    

年代:1975

数据来源: Taylor

摘要:

A simple technique for stabilization of the metal cutting process has been investigated. It was found when machining orthogonally on a tube with controlled contact tools that for a given feed per revolution there is a critical tool contact length below which instability will not occur irrespective of the width of cut.

ISSN:0020-7543    

DOI:10.1080/00207547508942975

出版商:Taylor & Francis Group    

年代:1975

数据来源: Taylor

摘要:

The elastic deformation of the links of a metal machining system leads to surface profiles which are often different from the desired shape. The analysis presented here is concerned with the machining accuracy attainable in turning for different head- and tail-stock compliances. The point of maximum departure from the ideal shape has been predicted analytically. Under the given conditions this has been found to depend upon the work length.

ISSN:0020-7543    

DOI:10.1080/00207547508942976

出版商:Taylor & Francis Group    

年代:1975

数据来源: Taylor

摘要:

Letncomponents of some type be subjected to a number (k) of tests : if a component passes all the tests it is regarded as reliable. The costs of administering each test to a component are known as well as the 2kprobabilities that a component will pass some tests and fail the others. There areK! ways in which the test can be ordered and the problem of finding the optimum, the most cost-effective sequencing of these tests was discussed in Berger and Gerstenfeld (1972). By the application of branch -and-bound technique the method of solving this problem can be simplified.

ISSN:0020-7543    

DOI:10.1080/00207547508942977

出版商:Taylor & Francis Group    

年代:1975

数据来源: Taylor

摘要:

Inter-firm comparative studies are widely used for a variety of purposes. They depend on close definition of data so that information from one firm is directly comparable with that from another. Ensuring comparability is not always easy and this note outlines a technique which researchers may find useful in validating data relating to firms' manufacturing processes.

ISSN:0020-7543    

DOI:10.1080/00207547508942978

出版商:Taylor & Francis Group    

年代:1975

数据来源: Taylor

ISSN:0020-7543    

DOI:10.1080/00207547508942979

出版商:Taylor & Francis Group    

年代:1975

数据来源: Taylor