ISSN:0740-817X    

DOI:10.1080/07408179208964219

出版商:Taylor & Francis Group    

年代:1992

数据来源: Taylor

摘要:

Are there “laws” of manufacturing? If so, what do they look like? If not, what other forms of knowledge might comprise intellectual foundations for a discipline of manufacturing? We differentiate among mathematical tautologies, laws, models, and theories, giving examples of each. Laws closely analogous to those of nineteenth century physics appear to be unlikely but empirical models offer the prospect of building new understanding of manufacturing, even if they may lack the precision of their classical counterparts. Descriptive models serving scientific goals tend to differ from prescriptive models for problem-solving. The latter must be complete enough to solve the practical problem at hand and yet be selective in their detail so as not to paralyze problem-solving with irrelevant complication. A growing collection of parsimonious models and theories can form a basis for the design, analysis and control of complex manufacturing systems.

ISSN:0740-817X    

DOI:10.1080/07408179208964220

出版商:Taylor & Francis Group    

年代:1992

数据来源: Taylor

摘要:

Traditional approaches to the modeling of complex manufacturing systems are expensive, time consuming, and of limited value. Recent developments in several areas (i.e., knowledge engineering, software engineering, modeling formalisms, engineering workstations, and database systems) are now to the point that a meaningful convergence can be crafted to yield a modeling environment far superior to any we have known in the past. Fundamental to this new approach to modeling are the recent developments in object-oriented programming and related technologies. A research team at Oklahoma State University has been exploring alternative approaches to the modeling and simulation of complex manufacturing systems since 1985. This paper argues for a fundamental paradigm shift in the development and utilization of models within a CEM framework.

ISSN:0740-817X    

DOI:10.1080/07408179208964221

出版商:Taylor & Francis Group    

年代:1992

数据来源: Taylor

摘要:

Advances in control, communications, computer science and engineering have made it possible to design and implement large scale systems, where the decision making, control and information processing are distributed. This research effort attempts to establish the theoretical foundation of operational decision integration for such systems. Decision integration is a method to improve the quality of decision making. The basic elements of the integration process are defined. A simple distributed hypothesis testing model is employed to demonstrate that properly designed integration always improves the quality of the decisions. The problem of organizing decision making agents into architectures of integration (parallel versus hierarchical) is addressed. Several elementary decision architectures for small organizations are analyzed, and their performance is compared. The results are also extended for the case of flexible architectures with adaptive topology. The implications of integration are discussed with respect to the overall performance of an organization.

ISSN:0740-817X    

DOI:10.1080/07408179208964222

出版商:Taylor & Francis Group    

年代:1992

数据来源: Taylor

摘要:

Approaches to multistage production scheduling can be conveniently classified into push type (i.e., Materials Requirements Planning (MRP) systems) or pull type (i.e., kanban systems). Each is generally thought to have both advantages and disadvantages. In this paper, a hybrid push/pull strategy is developed with the aim of gaining the advantages of both approaches. Material flow between work centers is regulated using the standard single card kanban/pull arrangement. Superimposed on this is the MRP-type information flow which feeds forward demand information directly to one or more (but not necessarily all) work centers.

ISSN:0740-817X    

DOI:10.1080/07408179208964223

出版商:Taylor & Francis Group    

年代:1992

数据来源: Taylor

摘要:

In this paper, we present a generic framework for controlling the work flow in computer controlled manufacturing systems. Based on a market-like model and a combination of objective and price mechanism, the framework allows heterogeneous job objectives, admits job priorities, recognizes multiple resources types, and allows multiple step negotiation between parts and resources. The framework is designed to accommodate frequent changes in the environment such as machine failures, tool shortages, and process requirement variations. An object-oriented simulation system is built to demonstrate the flexibility and effectiveness of die proposed framework. The results show that the proposed framework provides a foundation for highly adaptive, real time shop floor control.

ISSN:0740-817X    

DOI:10.1080/07408179208964224

出版商:Taylor & Francis Group    

年代:1992

数据来源: Taylor

摘要:

In this paper, the design principles of a new knowledge-based on-line simulation (KBOLS) architecture for the purpose of integrating the supervisory decision making process with a shop floor control system is discussed. The requirements for implementing the KBOLS architecture in a computer integrated manufacturing environment are presented. The special features of the KBOLS architecture include a knowledge-based controller capable of interacting with the shop floor and a manufacturing simulator, a shared blackboard data structure for knowledge bases, and a learning module. The KBOLS architecture is implemented in a flexible manufacturing system for analyzing interruptions due to machine breakdowns and rush orders.

ISSN:0740-817X    

DOI:10.1080/07408179208964225

出版商:Taylor & Francis Group    

年代:1992

数据来源: Taylor

摘要:

The bottleneck in creation of Flexible Manufacturing Systems (FMS) is the development of control software. This paper presents a systematic approach to automate the development of control software for flexible manufacturing cells both at the workstation and cell controller level. Context-free grammars are proposed as the formal basis, and the FMS system is controlled as a byproduct of recognizing the context free grammars. The underlying system architecture, along with the physical, system and functional models are presented for the various components of the FMS. Implementation of the proposed approach is also discussed.

ISSN:0740-817X    

DOI:10.1080/07408179208964226

出版商:Taylor & Francis Group    

年代:1992

数据来源: Taylor

摘要:

The Division of Design and Manufacturing Systems (DDM) was created at the National Science Foundation to support research that seeks to serve a broad spectrum of U.S. industry by developing and expanding the scientific and engineering foundations of design, manufacturing and production. This objective is accomplished through support of individual investigators and the implementation of special initiatives that encourage academic teaming as well as interaction between academia and industry. This paper presents an overview of these initiatives along with a summary of current activities and research trends.

ISSN:0740-817X    

DOI:10.1080/07408179208964227

出版商:Taylor & Francis Group    

年代:1992

数据来源: Taylor

ISSN:0740-817X    

DOI:10.1080/07408179208964228

出版商:Taylor & Francis Group    

年代:1992

数据来源: Taylor