摘要:

Many production managers of flow-line systems, such as in the steel and metal processing industries, observe the high levels of in-process inventories. They feel that it should be possible to reduce these inventories; however, before doing so it is necessary for them to understand their function. Although the general rule that inventories exist because of imbalance in supply and demand at a point within the system is true, it is necessary to show more precisely how such an imbalance might arise in single-product systems due to variability in processing times at the stations, or interruptions in production due to breakdown and subsequent repair of stations. Quantitative results have been obtained which indicate how such factors as the number, location and capacity of inventory bank, affect the system production rate. These results enable system designers and operators to check whether their systems could be improved.

ISSN:0020-7543    

DOI:10.1080/00207547108929891

出版商:Taylor & Francis Group    

年代:1971

数据来源: Taylor

摘要:

This paper considers the modelling of an actual batch/flow environment and discusses in detail the basic production system used in this study and its associated sequencing problem. The approach adopted for this problem is outlined and the concept behind the use of a simulation model as a day-to-day tool for production control is discussed. Finally, the limitations of such an approach for a large but fairly stable production unit are presented.

ISSN:0020-7543    

DOI:10.1080/00207547108929892

出版商:Taylor & Francis Group    

年代:1971

数据来源: Taylor

摘要:

This paper describes a project that was performed to maximize profit from the manufacture of a particular type of fork lift truck, with consideration given to manufacturing quantity, range of sizes and sales price. Sales revenue and manufacturing costs were evaluated for each size of truck at different sales levels. The optimal range of sizes was thon determined using a dynamic programming approach. The results of the study together with an outline of how the work may be extended in the future are discussed.

ISSN:0020-7543    

DOI:10.1080/00207547108929893

出版商:Taylor & Francis Group    

年代:1971

数据来源: Taylor

摘要:

A group of twenty volunteers from difficult production jobs was used to evaluate the hypotheses that (1) the physiological strain resulting from production floor stress will be high, (2) production floor strain can be predicted from apparatus tests and (3) production floor strain will adversely affect performance. Each subject had his heart rate and respiration rate measured as he performed a sot of apparatus tests in a laboratory and as he performed his job on the production floor.

ISSN:0020-7543    

DOI:10.1080/00207547108929894

出版商:Taylor & Francis Group    

年代:1971

数据来源: Taylor

摘要:

A four alternative Choice Reaction Task, oil alternatives equally likely, was used to study the effect of size and contrast ratio of the visual stimulus on response time. A full factorial experiment was designed in which three levels of both the variables were tested. Sizes subtending visual angle of 1 min, 3 min, and 5 mill and the contrast ratios of 0-94, 0-75, and 0-34 were used. Seventeen subjects wore tested for this experiment and each subject responded 250 times under each experimental condition. The analysis has indicated that the contrast ratios tested did not significantly (a = 0'05) effect the response time.

ISSN:0020-7543    

DOI:10.1080/00207547108929895

出版商:Taylor & Francis Group    

年代:1971

数据来源: Taylor

摘要:

Indirect work is becoming more important as capital equipment become a more sophisticated and the proportion of direct labour coat in the manufacturing cost decreases. Measurement of non-repetitive work by stop-watch time study or predetermined human work-time3 is not adequate. The application of multiple regression in the setting of standards for non-repetitive work is discussed.

ISSN:0020-7543    

DOI:10.1080/00207547108929896

出版商:Taylor & Francis Group    

年代:1971

数据来源: Taylor

摘要:

A specially constructed simulated assembly task was used to test the effectiveness of several multichannel communication combinations. The assembly task was a pegboard with a 4 × 4 matrix of ⅓-in. diameter, 3 in. long wooden dowels placed on ⅓-in. centres. Three type3 of wooden washers were made to fit on to the matrix of wooden pegs. The washers were assembled on to the pegs according to a sot of instructions presented to the subject.

ISSN:0020-7543    

DOI:10.1080/00207547108929897

出版商:Taylor & Francis Group    

年代:1971

数据来源: Taylor

摘要:

A particular form of assembly line is examined by computer assisted simulation for conditions of perfect and imperfect balance between manual work stations. Some account has been taken of a possible response by operators to the pacing inherent in this form of working. Conclusions are drawn in regard to the effects of initial feed rate, variable operator work cycle times and tolerance time (i.e. the time that a part is available for servicing before passing unprocessed) on output, unprocessed work and operator utilization.

ISSN:0020-7543    

DOI:10.1080/00207547108929898

出版商:Taylor & Francis Group    

年代:1971

数据来源: Taylor

摘要:

A now and versatile automatic feeding and orienting system is described and analysed both experimentally and theoretically. The system is particularly suitable for orienting laminar parts and can utilize both the geometry and mass distribution of the part as orienting aids. Unlike the vibratory bowl feeder, where orientation is generally achieved by the rejection of incorrectly oriented parts, in the system described, orientation is achieved principally by the use of re-orienting techniques. Further, the performance of this system is readily predictable.

ISSN:0020-7543    

DOI:10.1080/00207547108929899

出版商:Taylor & Francis Group    

年代:1971

数据来源: Taylor

摘要:

Owing to expense effects, the operation of NC machine tools requires safely calculable technological data. The tool life criteria must form the basis of these, the connection of which with the technological data for given tool-workpiece material coupling can be determined simply, at low cost and quickly, even by the employer of the machine. The study deals with the calculation of tool life of semi-rough turning. The tool life criterion is the depth of crater. Its changes are calculated for length and cross-turning. The analytical method valid for cross-turning offers a direct possibility for the continuous plotting of the Taylor curve, for determination of its constants. The procedure after the solution of still unclarified questions offers a possibility for a decrease in the order of cost and time requirements of tool life tests

ISSN:0020-7543    

DOI:10.1080/00207547108929900

出版商:Taylor & Francis Group    

年代:1971

数据来源: Taylor