ISSN:0160-5682    

DOI:10.1057/jors.1980.199

出版商:Taylor&Francis    

年代:1980

数据来源: Taylor

ISSN:0160-5682    

DOI:10.1057/jors.1980.200

出版商:Taylor&Francis    

年代:1980

数据来源: Taylor

摘要:

AbstractThis is an account of a small scale study of the actual practice of problem structuring in a number of U.K. O.R. groups. The major result is a descriptive model of problem structuring called the Exploration Approach. A description of this model is given.

ISSN:0160-5682    

DOI:10.1057/jors.1980.201

出版商:Taylor&Francis    

年代:1980

数据来源: Taylor

摘要:

AbstractThis note describes the design, implementation and consequences of a stock control system employing interactive mini computers for a number of builders and plumbers merchants.The system enables the quantification of the strategic decisions of the company, for example the consequences of changing the total investment in stock, or the overall service level. The selected strategy determines the calculations used for the interactive buying routines, which consider items in groups. Other aspects and the results of the implementation are described together with the necessary theory and routines employed.

ISSN:0160-5682    

DOI:10.1057/jors.1980.202

出版商:Taylor&Francis    

年代:1980

数据来源: Taylor

摘要:

AbstractThe objective is to compute equilibrium interregional trade flows in relation to approximately linear supply and demand curves for a single commodity. There arenregions on a network characterized by approximately linear interregional transportation costs. Quadratic programming approaches can be greatly simplified by exploiting the special structure of the problem. This paper shows how the reduced quadratic program can then be partitioned using Benders decomposition. The computation then involves solving relatively small transportation problems and quadratic programming problems. Numerical experiments show the method to be effective in reducing computational requirements.

ISSN:0160-5682    

DOI:10.1057/jors.1980.203

出版商:Taylor&Francis    

年代:1980

数据来源: Taylor

摘要:

AbstractMarkov chains have been suggested since the early sixties for modeling manpower supply, mostly in military, governmental and public agencies. An actual industrial application is presented. This will be of interest to managers as well as practitioners and students of operational research. The approach, use and validation of the Markov model are discussed, along with some limitations and extensions.

ISSN:0160-5682    

DOI:10.1057/jors.1980.204

出版商:Taylor&Francis    

年代:1980

数据来源: Taylor

摘要:

AbstractIn this note we show that the results of Nakagawa and Osaki are optimal over both deterministic and random repair limit policies.

ISSN:0160-5682    

DOI:10.1057/jors.1980.205

出版商:Taylor&Francis    

年代:1980

数据来源: Taylor

摘要:

AbstractHokstad recently published an approximate method for calculating the behaviour of anM/G/mqueue. This note applies his results to the nonpreemptive priority situation with two priority classes having the same service-time distribution. Laplace transforms and the first two moments of the waiting-time distributions are given.

ISSN:0160-5682    

DOI:10.1057/jors.1980.206

出版商:Taylor&Francis    

年代:1980

数据来源: Taylor

ISSN:0160-5682    

DOI:10.1057/jors.1980.207

出版商:Taylor&Francis    

年代:1980

数据来源: Taylor

ISSN:0160-5682    

DOI:10.1057/jors.1980.208

出版商:Taylor&Francis    

年代:1980

数据来源: Taylor