摘要:

The primary purpose of this paper is to report the results of a survey conducted to establish the nature of the use of certain methods for mass production in the U.K. engineering industry. Prior to describing the survey we shall specify and give terminology for the methods to be included, and the aspects of mass production to be covered.

ISSN:0020-7543    

DOI:10.1080/00207547408919573

出版商:Taylor & Francis Group    

年代:1974

数据来源: Taylor

摘要:

A medium size centre lathe has been dynamically tested both by forced vibration testing technique and cutting tests. In this investigation the workpiece used is supported by the chuck and a running centre.

ISSN:0020-7543    

DOI:10.1080/00207547408919574

出版商:Taylor & Francis Group    

年代:1974

数据来源: Taylor

摘要:

An original procedure for the determination of the optimum value of tool life criterion of cutting tools tooled with throw-away carbide tips is described in this paper. The procedure has the character of an iterative method, on the basis of which one can reach the optimum value of tool life criterion with respect to attaining the minimum machining cost. The algorithm of the given method is represented in a bar chart, where we can see two calculation cycles, their purpose and other relationships. A practical example closes the paper.

ISSN:0020-7543    

DOI:10.1080/00207547408919575

出版商:Taylor & Francis Group    

年代:1974

数据来源: Taylor

摘要:

The process of designing the tool layout for a single spindle multi-station automatic chucking lathe has been analysed and formulated as a set of algorithms which enable the process to be performed automatically on a digital computer. A simple, cheap and natural means of communication between the design office and the computer has been designed, and the computer output has been arranged to convey the resulting information clearly by means of layout drawings for each station and of tabulated operating data.

ISSN:0020-7543    

DOI:10.1080/00207547408919576

出版商:Taylor & Francis Group    

年代:1974

数据来源: Taylor

摘要:

The paper describes a double-sampling scheme for controlling the mean of a normal population. Results are presented which show considerable improvement over certain single-sampling schemes when judged by the criterion of average production run length.

ISSN:0020-7543    

DOI:10.1080/00207547408919577

出版商:Taylor & Francis Group    

年代:1974

数据来源: Taylor

摘要:

Acceptance sampling by exponential smoothing presents a concept whereby each lot is accepted or rejected through interrogation of the current lot and all prior lots submitted. The number of defectives of a lot, in conjunction with historical results, is transformed to a quality index by simple exponential smoothing, utilizing larger values of the smoothing constant to lend more weight to the quality of current lots inspected. This quality index is compared with a predetermined threshold index to determine if the lot is to be accepted or rejected. This quality index is then retained to be used as the historical quality information to be applied to the quality index of the next lot.

ISSN:0020-7543    

DOI:10.1080/00207547408919578

出版商:Taylor & Francis Group    

年代:1974

数据来源: Taylor

摘要:

This paper compares four major schemes used for forecasting mean demand to be used as input into an inventory model so that ‘ optimum ’ stockage levels can be obtained. The inventory model is the classical order up toS, infinite horizon model with carry-over from period to period and complete back-ordering. Maximum likelihood, exponential smoothing, standard Bayes and adaptive Bayes schemes are used and results, via Monte Carlo simulation, are obtained on the average costs per period for (1) stationary demand, (2) long-term trend and (3) ‘ shock ’ changes in mean demand.

ISSN:0020-7543    

DOI:10.1080/00207547408919579

出版商:Taylor & Francis Group    

年代:1974

数据来源: Taylor

摘要:

Twenty-four male subjects performed a visual vigilance task under various temperature conditions (70°, 82° and 90°F, Effective Temperature, -°FET). They determined for themselves when they desired a rest from monitoring. Those subjects selecting ‘ long ’ sessions had both poorer performance scores and less accurate time estimates than their peers. The subjects in general did a poor job of relating their own thermal discomfort, drowsiness, boredom, estimates of job performance and preference for the task to their actual performance score and/or time on duty. No significant temperature effects were noted.

ISSN:0020-7543    

DOI:10.1080/00207547408919580

出版商:Taylor & Francis Group    

年代:1974

数据来源: Taylor

ISSN:0020-7543    

DOI:10.1080/00207547408919581

出版商:Taylor & Francis Group    

年代:1974

数据来源: Taylor