摘要:

The paper investigates the effect of exponentially smoothing learning curve data plotted in the time constant model form. In the time domain, the result is a smoothed, delayed version, of the raw data. Attenuation of scatter about the trend line is predicted using the z transform method to establish the exponential smoother frequency response. The optimum time shift for trend correction is determined by an analogue method based on the Matsuburu time delay theorem, the result being identical to that obtained using the ‘ equivalent age of data ’ concept. Results for six industrial operators performing light assembly tasks confirm the optimum time delay prediction as judged by the minimization of mean square error criterion, and the frequency response analysis is confirmed on application to a learning curve describing crew performance during a simulated naval underwater mission.

ISSN:0020-7543    

DOI:10.1080/00207547708943099

出版商:Taylor & Francis Group    

年代:1977

数据来源: Taylor

摘要:

Decision tables provide a graphical representation of complex procedures in a way that is easy to visualize and understand. The work required to define the system, develop and programme the solution and to provide the often neglected documentation can be incorporated in a tabular form so that all elements of decision taking are precisely denned. The tables present the relationships among the interfacing variables dearly and show the necessary sequences of conditions and actions in a simple manner. The writing and development of decision tables for implementation in a manufacturing system is indicated here giving details of appropriate checking procedures and con straint boundaries.

ISSN:0020-7543    

DOI:10.1080/00207547708943100

出版商:Taylor & Francis Group    

年代:1977

数据来源: Taylor

摘要:

This paper addresses a significant problem in the management of production/logistics systems: the influence of quality control activities on production scheduling. A sequential three-way classification decision model is presented for rapidly identifying trends in vendor lot quality. The effectiveness of this decision model is illustrated using a simulation model of a material and information flow system. The results show significant cost savings using this approach rather than the more traditional and passive methods of control over vendor quality.

ISSN:0020-7543    

DOI:10.1080/00207547708943101

出版商:Taylor & Francis Group    

年代:1977

数据来源: Taylor

摘要:

An adaptive control algorithm is formulated which provides, in real time, an optimal adjustment to a controller Bet-point in response to changes in the operating characteristics of the process. Such an algorithm is applicable to a variety of industrial processes: for example, those in which the product is either a containerized consumable or a sheet of some type.

ISSN:0020-7543    

DOI:10.1080/00207547708943102

出版商:Taylor & Francis Group    

年代:1977

数据来源: Taylor

摘要:

Response surface methodology had been applied to tool-life study in conventional machining. This paper presents results of the application of this statistical technique to direct current hot machining. A tool-life predicting equation with four variables of speed, feed, depth of cut and direct current was developed. Good correlation between the predicted and actual tool-life test results was obtained.

ISSN:0020-7543    

DOI:10.1080/00207547708943103

出版商:Taylor & Francis Group    

年代:1977

数据来源: Taylor

摘要:

In the literature on reliability the term failure rate is given to four different concepts. To remedy some of the confusion thereby engendered the differences in meaning and applicability of the four concepts are discussed.

ISSN:0020-7543    

DOI:10.1080/00207547708943104

出版商:Taylor & Francis Group    

年代:1977

数据来源: Taylor

摘要:

The basic objective of this paper is to investigate the ordered entry conveyor serviced production system with dual input, and to analyse the probabilistic nature of such a system through the application of queueing theory. A mathematical model was developed for the three channel ordered entry conveyor system with two types of arrivals having independent Poisson distribution.

ISSN:0020-7543    

DOI:10.1080/00207547708943105

出版商:Taylor & Francis Group    

年代:1977

数据来源: Taylor

摘要:

The problem of inventory control has received increasing attention over the last 16 to 20 years, which has resulted in a vast amount of literature. Two types of inventory can be distinguished: (1)manufacturinginventories, which contain dependent demand items and are most efficiently controlled by means of Material Requirements Planning (MRP), and (2)distributioninventories, which contain independent demand items and for which Statistical Inventory Control (SIC) techniques are usually employed.

ISSN:0020-7543    

DOI:10.1080/00207547708943106

出版商:Taylor & Francis Group    

年代:1977

数据来源: Taylor

摘要:

The method given in this paper is typically applicable to those inventory problems where a product is procured by a single customer from a single supplier. An example has been solved to illustrate the method.

ISSN:0020-7543    

DOI:10.1080/00207547708943107

出版商:Taylor & Francis Group    

年代:1977

数据来源: Taylor

ISSN:0020-7543    

DOI:10.1080/00207547708943109

出版商:Taylor & Francis Group    

年代:1977

数据来源: Taylor