摘要:

The paper gives a practical, branch and bound based solution to the scheduling problem as found in real life. Organizational aspects of solving the scheduling problem are considered, and two organizational ideas, ’ the area of responsibility ’ and ’ the time span of action ’, are presented. Intelligibility to administrators and operatives of the output from any scheduling system is emphasized, and the adoption of a wholly new concept, the ’ Generalized Ordered Schedule ’, is advocated as a means of achieving intuitive appeal and improved control. The requirements which any useful scheduling system must satisfy are identified, from field Btudies, and reported. Data are presented on a collection of real problems, and comparisons of decision rule solution procedures with the branch and bound procedure given. These demonstrate that the usually accepted results from conventional simulation and other techniques using artificial job/operation time and technological route matrices are misleading.

ISSN:0020-7543    

DOI:10.1080/00207547908919598

出版商:Taylor & Francis Group    

年代:1979

数据来源: Taylor

摘要:

Manual adaptive control (MAC) is a system under development at Carnegie Mellon University in which a programmable calculator is used to adjust a machine tool to operate under optimum conditions (usually minimum cost per part). The machine operator is the sensor and is part of the control loop. This paper illustrates how the system is applied to axial feed centreless grinding operations.

ISSN:0020-7543    

DOI:10.1080/00207547908919599

出版商:Taylor & Francis Group    

年代:1979

数据来源: Taylor

摘要:

There is no single concept of a manufacturing system covering all industries in every detail. It is necessary to examine the fundamental properties and characteristics of a range of systems and to consider the way they are synthesized and operated before consolidating general conclusions. What is seen depends very much on the viewpoint and the narrowness of the focusing range. Nevertheless there is much to be gained from a fundamental study of-all aspects of manufacturing systems and their interactions since there are opportunities for technology transfer between industries

ISSN:0020-7543    

DOI:10.1080/00207547908919600

出版商:Taylor & Francis Group    

年代:1979

数据来源: Taylor

摘要:

This paper deals with the problem of estimating the variability for distributions associated with the facilities design problem. An empirical model is proposed to estimate the variance of these distributions from the basic flow and distance data, which compares favourably with the one proposed by Wallace, Hitchings and Towill, yielding, in general, better predictions of the variance.

ISSN:0020-7543    

DOI:10.1080/00207547908919601

出版商:Taylor & Francis Group    

年代:1979

数据来源: Taylor

摘要:

The practice of ignoring station length constraints on assembly lines where large items are attached to a moving belt at regular intervals and permitting neighbouring operators to perform their tasks within the same track sections to some extent is frequently observed in industry and has often been mooted in research publications. However, no theoretically or numerically derived results exist to demonstrate the effectiveness of such measures in alleviating the debilitating interaction of a constant, mechanically-set throughput rate and a series of work stages that each exhibit a random nature with regard to their operation times. Such considerations are important because capital investment in this type of manufacturing facility is usually high, output is also of high value and the assembly technology generally decrees that facilities are semi-permanent, and thereby emphasises pre-production planning aspects.

ISSN:0020-7543    

DOI:10.1080/00207547908919602

出版商:Taylor & Francis Group    

年代:1979

数据来源: Taylor

摘要:

An experimental investigation of material removal from four aluminium oxide ceramics by a single point diamond tool was conducted. A kinetic model was constructed and the specific grinding energy was determined for a variety of grinding conditions.

ISSN:0020-7543    

DOI:10.1080/00207547908919603

出版商:Taylor & Francis Group    

年代:1979

数据来源: Taylor

ISSN:0020-7543    

DOI:10.1080/00207547908928104

出版商:Taylor & Francis Group    

年代:1979

数据来源: Taylor