摘要:

Automated process planning (APP) is a critical interface to both design and manufacturing. Several evolving systems have employed artificial intelligence (AI) procedures to capture the basic logic used by a process planner. However, no effort has been directed to systemize the knowledge in the field of process planning. In this paper process planning knowledge extraction and formalization will be discussed. A framework for the development of intelligent APP systems capable of learning through user interaction is also presented.

ISSN:0020-7543    

DOI:10.1080/00207548808947915

出版商:Taylor & Francis Group    

年代:1988

数据来源: Taylor

摘要:

A key element of manufacturing planning and control involves the inter-functional coordination of various manufacturing requirements. This paper reports the results of a simulation experiment that compares alternative master production scheduling (MPS) procedures in an assemble-to-order environment. The MPS procedures are superbills and covering sets. For a given investment in safety stocks the managerial problem is how to construct the MPS in order to minimize the firm's delivery time pressures. The results of the simulation experiment strongly support the use of the superbill techniques over the covering set technique. Moreover, of the experimental factors that influence delivery time performance, the choice of master production scheduling technique has the largest effect. Demand variability has the next greatest effect on delivery time performance. The safely stock level has the third greatest effect and product commonality was fourth. Finally, the managerial implications of the results are discussed in detail.

ISSN:0020-7543    

DOI:10.1080/00207548808947916

出版商:Taylor & Francis Group    

年代:1988

数据来源: Taylor

摘要:

This article attempts to provide a conceptual basis for design of a decision support system (DSS) for the human supervisory controller in computer-integrated manufacturing systems (CIMSs) that acknowledges human cognitive abilities and limitations as well as the unique features of the CIMS environment. Issues related to information overload and to DSS design that are considered relevant to the CIMS environment are first examined. Utilizing a vertical/on-line/horizontal model of information flow within the CIMS, a conceptual basis for DSS design is then provided that considers the demands of the CIMS and the abilities of the human to meet those demands. Examples are provided to illustrate the proposed ideas underlying DSS design.

ISSN:0020-7543    

DOI:10.1080/00207548808947917

出版商:Taylor & Francis Group    

年代:1988

数据来源: Taylor

摘要:

The ability to evaluate flexible manufacturing (FM) in the context of the relationship between manufacturing and the total company shows that, using the nature of the financial benefits as the criteria, FM can be divided into four categories. By identifying the potential benefit of each category, predictions are made about those future developments which are required to increase the scope and viability of FM.

ISSN:0020-7543    

DOI:10.1080/00207548808947918

出版商:Taylor & Francis Group    

年代:1988

数据来源: Taylor

摘要:

Job assignment is a well-known problem in manufacturing lines. Line management tries to maximize line productivity by assigning a given crew a set of predefined line jobs. However, problems may arise because of abnormal conditions such as absenteeism, workstation failure, parts shortage, or unevenly distributed work-in-process. This report considers a dynamic job-assignment policy making use of online information for assignment. This policy attempts to achieve a good skill match between jobs and operators, and to eliminate unnecessary assignments. To fulfill this policy, a two-part assignment program is proposed: an algorithm for job matching and a set ofad hocrules. The matching algorithm is well established in literature, but thead hocrules are application-dependent. Discussion here concentrates on thead hocrules and online data collection.

ISSN:0020-7543    

DOI:10.1080/00207548808947919

出版商:Taylor & Francis Group    

年代:1988

数据来源: Taylor

摘要:

The paper deals with a version of the general non-permutation flow-shop scheduling problem in which the duration of each operation on certain machines is a linear function of the allotted part of a constrained resource (e.g. energy, fuel, catalyzer, oxygen, raw material, money) and the objective is to determine both a sequence of the operations on each machine and an allocation of resource to each operation in order to minimize the over-all completion time. The algorithm for solving this problem is based on the disjunctive graph theory and branch and bound technique. Due to the present elimination properties, the search tree is strongly restricted. It applies a special system of fixing precedence relations in each node of the search tree yielding strong lower and upper bounds. To quickly obtain a strong upper bound a special heuristic method is used (to calculate a good initial solution) and the descendants in the search tree are chosen in order of the non-decreasing lower bounds. Some computational results and concluding remarks are included as well.

ISSN:0020-7543    

DOI:10.1080/00207548808947920

出版商:Taylor & Francis Group    

年代:1988

数据来源: Taylor

摘要:

Japanese industrial management techniques have been applied in a large number of large Western enterprises. In particular, the Kanban method has been used to control materials, production rate and volume, and to adjust production to requirements. The authors show how the Kanban method may be adapted to the job shop. This adaptation was extensively tested through simulation and then implemented. Actual performance is consistent with the simulation results, and shows marked improvement over previous practice.

ISSN:0020-7543    

DOI:10.1080/00207548808947921

出版商:Taylor & Francis Group    

年代:1988

数据来源: Taylor

摘要:

We describe a simple modification of Palmer's heuristic for scheduling jobs in a flow shop. While the additional computation required is relatively small, the performance of the algorithm compares very well with that of the more sophisticated and better algorithm of Campbell,et al. (1970) at a fraction of the effort required by the latter.

ISSN:0020-7543    

DOI:10.1080/00207548808947922

出版商:Taylor & Francis Group    

年代:1988

数据来源: Taylor

摘要:

This paper provides a set of recursive equations for computing the AOQ (average outgoing quality) of an unreliable random FMS (flexible manufacturing system). The FMS is described using Whitt's approximation to a network ofGI/G/Squeues. Relationships between the operating and quality manufacturing characteristics of the FMS are found. Numerical examples are provided and the impact of outgoing quality variability on location of inspection in an FMS is discussed. This latter topic is left for further research however.

ISSN:0020-7543    

DOI:10.1080/00207548808947923

出版商:Taylor & Francis Group    

年代:1988

数据来源: Taylor

ISSN:0020-7543    

DOI:10.1080/00207548808947925

出版商:Taylor & Francis Group    

年代:1988

数据来源: Taylor