摘要:

Ideally a production line is perfectly balanced and most efficient when all the stages have been allocated an equal amount of task times, but realistically this situation is almost impossible for a practical problem. For such an ideal situation, the just-in-time (pull system) production system holds no inventory in between the stages, such that the production process is just-in-time. The stage operation limes are random variables and the mean of each operation time has been assumed deterministic in sampling from a group of different mean operation times. Thus, because of the differences in stage operation times due to the variability of the operator's performance and/or unequal distribution of task times, the production line experiences various types of problems. In this paper we tried to see the effects of this imbalance of stage operation times in a just-in-time (JIT) production system. In addition to the implications of the simulation results, an indication for further research has been given in the conclusion.

ISSN:0020-7543    

DOI:10.1080/00207548808947837

出版商:Taylor & Francis Group    

年代:1988

数据来源: Taylor

摘要:

Recently, Just-In-Time (JIT) purchasing practices have been recognized as a cornerstone of Japan's success in improving product quality and productivity. Traditionally, however, US firms have treated purchasing functions as a ‘profit centre’. This paper presents the proposition that US firms must recognize the potential of purchasing activities as ‘quality and productivity centres’ through successful implementation of JIT purchasing. Personal interviews have been conducted at four US manufacturing firms in an effort, first, to identify the major activities of JIT purchasing that have favourable effects on product quality and productivity and, second, to describe how these activities can improve product quality and productivity in US firms.

ISSN:0020-7543    

DOI:10.1080/00207548808947838

出版商:Taylor & Francis Group    

年代:1988

数据来源: Taylor

摘要:

This paper reviews the applicability of just-in-time concepts to the plastics processing industry focusing on three specific areas: quality management, technological requirements, and raw material purchasing practices. Plastics processing is inherently hatch oriented, due to the time required to stabilize the moulding process, Just-in-time is generally thought to apply to repetitive rather than batch processes. The authors found that a number of just-in-time concepts are quite applicable to plastics processing.

ISSN:0020-7543    

DOI:10.1080/00207548808947839

出版商:Taylor & Francis Group    

年代:1988

数据来源: Taylor

摘要:

Beam search is a technique for searching decision trees, particularly where the solution space is vast. The technique involves systematically developing a small number of solutions in parallel so as to attempt to maximize the probability of finding a good solution with minimal search effort. In this paper, we systematically study the performance behaviour of beam search with other heuristic methods for scheduling, and the effects of using different evaluation functions to guide the search. We also develop a new variation of beam search,called filtered beam searchwhich is computationally simple yet produces high quality solutions.

ISSN:0020-7543    

DOI:10.1080/00207548808947840

出版商:Taylor & Francis Group    

年代:1988

数据来源: Taylor

摘要:

The objective of this research is to develop a data-driven computer simulator to evaluate the performance of an individual robotic manufacturing cell by analysing the interactions between the robot and the machines in the cell. The model has been written in FORTRAN IV, utilizes the SLAM simulation language, and executes on an IBM 3033 computer. To validate the model, the simulation results were compared to the results of a mathematical queueing model. Finally, the analysis of a system wherein a deadlocked situation is expected has been provided as an example.

ISSN:0020-7543    

DOI:10.1080/00207548808947841

出版商:Taylor & Francis Group    

年代:1988

数据来源: Taylor

摘要:

The use of automated guided vehicles (AGVs) as transporters and mobile workstations in automated assembly lines is on the increase. This is due in part to the flexibility AGVs introduce in the design of production lines. In this paper, models for the management and control of material flow through AGV based production lines are developed. The use of the models permits the line designer to optimally determine the launch times of successive unit loads of parts into the line to minimize production makespan while balancing between line idleness and the idleness of vehicles employed on the line. The use of the models for AGV based production line design purposes is demonstrated through example problems.

ISSN:0020-7543    

DOI:10.1080/00207548808947842

出版商:Taylor & Francis Group    

年代:1988

数据来源: Taylor

摘要:

This paper addresses the problem of loading pallets with multiple size boxes. It focuses on the physical aspects of using a robot to load multiple size boxes on pallets. The paper presents an algorithm that determines individual box placement on a multiple layer pallet, assuming that multiple box sizes is a limitation. This study was done using an algorithm and a robot sequence program. The program was run on an IBM RS-1 robot. The problems associated with robotic implementation are discussed in detail.

ISSN:0020-7543    

DOI:10.1080/00207548808947843

出版商:Taylor & Francis Group    

年代:1988

数据来源: Taylor

摘要:

The emphasis of the approaches which have been made to economic justification of robots has been toward their initial acquisition and in large batch and mass production environments. This paper examines the effect that alternative methods of operating a robot cell will have on its economic performance in small batch manufacture. Particular attention is given to the investment in tooling and fixtures and to the cost per piece produced by the cell.

ISSN:0020-7543    

DOI:10.1080/00207548808947844

出版商:Taylor & Francis Group    

年代:1988

数据来源: Taylor

摘要:

Human interpretation of CAD data is required for generating process plans and NC tape images in existing CAD/CAM systems. In order lo eliminate this human interpretation, an algorithm for automatically identifying all machined surfaces on symmetric rotational parts is presented. An implementation procedure of the surface recognition algorithm is described along with examples. The algorithm is suitable for manufacturing applications, such as automated process planning, classification and coding, and NC tape image generation.

ISSN:0020-7543    

DOI:10.1080/00207548808947845

出版商:Taylor & Francis Group    

年代:1988

数据来源: Taylor

摘要:

Although prototyping is a technique widely used in manufacturing industry during the design development and manufacture of a new or updated project, the technique is rarely used to test out options during the design of a manufacturing system. The work organization action simulation was developed in response to a need identified in the training of engineers. Such an approach can be used to prototype socio-technical systems and explore technical options in association with the organizational structure.

ISSN:0020-7543    

DOI:10.1080/00207548808947846

出版商:Taylor & Francis Group    

年代:1988

数据来源: Taylor