The Akhtar, Mohammad Saeed creator Techapun Raengkhum Chairperson Pakorn Adulbhan Examination Committee Sharif, M. N. Examination Committee The Government of New Zealand Scholarship Donor text th Bangkok Asian Institute of Technology 1977 monographic eng

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45 p. This study investigates the relationship between operator fatigue and quality deterioration. Based on t he data collected from a selected factory, it is found that a straight line is the best fit for the relationship. The finding is incorporated in the design of economic quality control chart models for a mass production man-machine process. As a matter of fact, the process may go out of control because of the machine errors or the human errors due to fatigue. If it is a machine error, t he machine can be readjusted. The human fatigue continuously increases the risk of false indication by the control chart. Model s formulated in this study are based on a trade off between the two types of risks involved: (a) indication of a shift in the process when non has taken place and (b) failure to indicate a shift when one has really occurred. Models are developed for attributes and variables control charts to minimize the total cost given by a set of optimal parameters the sample size; the multiple of standard deviation which determines the spread of control limits; and the sampling frequency. Data from a factory has been used to test the applicability of the models . A thesis submitted in partial fulfillment of the requirements for the degree of Master of Engineering of the Asian Institute of Technology, Bangkok, Thailand Thesis (M.Eng.) - Asian Institute of Technology, 1977 Quality control Industrial management Asian Institute of Technology. http://203.159.5.9/ait-thesis/detail.php?q=B23225 http://203.159.5.9/ait-thesis/detail.php?q=B23225 240398 20260818094542.0