TY  - BOOK
AU  - Akhtar,Mohammad Saeed
AU  - Techapun Raengkhum, 
AU  - Pakorn Adulbhan, 
AU  - Sharif,M.N.
ED  - The Government of New Zealand, 
TI  - The economic design of control charts incorporating the effect of operator fatigue
T2  - Thesis
PY  - 1977///
CY  - Bangkok
PB  - Asian Institute of Technology
KW  - Quality control
KW  - Industrial management
N1  - 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
N2  - 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
UR  - http://203.159.5.9/ait-thesis/detail.php?q=B23225
ER  -