摘要:

This paper extends existing quantitative methods for the economic evaluation of alternative investment proposals to the arena of decision-making within economies characterized by inflationary trends. The models developed may be used in transactions involving one or several countries each having a differing rate of inflation.

ISSN:0020-7543    

DOI:10.1080/00207546708929770

出版商:Taylor & Francis Group    

年代:1967

数据来源: Taylor

摘要:

The basic model for determining optimal lot sizes in production-inventory systems is: (the lot size = Z). If interactions between two or more products of the system cause restrictions to be laid upon the lot sizes, the technique of Lagrangian multipliers may be used for solving the lot size problem. A successful practical application of the Lagrange-technique depends largely upon the availability of electronic data-processing equipment.

ISSN:0020-7543    

DOI:10.1080/00207546708929771

出版商:Taylor & Francis Group    

年代:1967

数据来源: Taylor

摘要:

This paper investigates the solution of the machine scheduling problem by a decomposition approach. The original problem is partitioned into a series of smaller, more manageable sub-problems. Considerable experimentation is conducled to study the statistical characteristics of this approach and to compare results with those obtained by complete or partial enumeration. The relative efficiencies of the decomposition solutions are investigated. The hypothesis that the mean of the schedule times shifts toward the minimum as the number of jobs in each sub-problem increases is tested. Finally, the computer times spent to obtain the complete or partial enumeration and decomposition solutions are compared.

ISSN:0020-7543    

DOI:10.1080/00207546708929772

出版商:Taylor & Francis Group    

年代:1967

数据来源: Taylor

摘要:

In connection with other work to develop decision making aids for use in engineering design it appeared that the technique of AIDA might be relevant to the production engineering problem of selecting satisfactory tooling arrangements for multi-station machine tools performing many different operations on the same component. This paper describes an experiment in which this technique was taught to two engineers and used by them as part of their normal programme of work. It is suggested that the technique is or most value in this connection when a number of people need to be involved in decisions, and for training.

ISSN:0020-7543    

DOI:10.1080/00207546708929773

出版商:Taylor & Francis Group    

年代:1967

数据来源: Taylor

摘要:

This article describes the use of an analog computer, operating in the iterative mode, to perform simulations of inventory policy situations. The inventory policies studied are the re-order level, re-order cycle and (s, S) policies, and within each of these inventory policies a replenishment order policy of either a fixed or variable type can be operated. All policies are subject to stochastic sized customer demand and lead-time durations and a cost model is developed to compare the operating costs of the various policies under these conditions. This cost model is used further to investigate in some detail the self-adaptability and the optimal character of the (s, S) policy.

ISSN:0020-7543    

DOI:10.1080/00207546708929774

出版商:Taylor & Francis Group    

年代:1967

数据来源: Taylor

摘要:

“The Siting of Depots” by K. B. Haley appeared in an earlier issue. The convexity proof developed there is based on the assumption that derivatives of the total cost function exist at all points. It is proven here that this assumption does not hold and an alternative proof is presented.

ISSN:0020-7543    

DOI:10.1080/00207546708929775

出版商:Taylor & Francis Group    

年代:1967

数据来源: Taylor

摘要:

Elementary theoretical models of the jolt, jolt-squeeze and vibration-squeeze methods of mould compaction are developed. The analysis is taken sufficiently far to display the significant features of each process, and the results appear to be consistent with foundry experience.

ISSN:0020-7543    

DOI:10.1080/00207546708929776

出版商:Taylor & Francis Group    

年代:1967

数据来源: Taylor

摘要:

The compact two-component dynamometer described is intended for use in the restricted space around the tools of a Swiss-type automatic. The general construction of the instrument, which employs air gauging principtes, is discussed and it is reported that its performance is unaffected by the abundant use of cutting fluid. Calculation of the parameters of the pneumatic system, and the calibration and performance of the complete system are discussed.

ISSN:0020-7543    

DOI:10.1080/00207546708929777

出版商:Taylor & Francis Group    

年代:1967

数据来源: Taylor