| Author | Panya Torchareon |
| Call Number | AIT Thesis no. IE-79-10 |
| Subject(s) | Tire industry--Quality control
|
| Note | A thesis submitted in partial fulfillment of the requirements for the degree of Master of Engineering, School of Engineering and Technology |
| Publisher | Asian Institute of Technology |
| Abstract | The existing quality control activities of Goodyear (Thailand) Co., Ltd. have been studied. An economic model is firstly formulated by employing the 'MARTIN' cost model and the Average Outgoing Quality (AOQ) concept as basis. By implying the economics of inspection versus no inspection, the
breakeven process average, p is found equal to unit inspection cost divided by unit damage cost. This breakeven process average is used to make a
decision whether to accept lots with no inspection or to impose a tightened inspection. It is justified that the lots with fraction defective, p > p
must be accepted with inspection, since the cost of inspection is less than the cost of acceptance with no inspection. In case of p < p, the lots are
accepted with no inspection, since the cost of acceptance with no inspection is less than the cost of inspection. However some sampling plan will be
performed in order to maintain a climate of responsibility and to be the alarming system when production becomes irregular. Since the expected outgoing quality level of the lots undergoing a working station and an inspection station is designed to be the quality level at p, the A0Q design is assumed equal to p. The designed single sampling plan is determined from AOQ's expression with the known lot size N, actual per cent defective p, and probability of acceptance Pa. Military Standard MIL-STD 105D and its switching rules are used for comparisons with the existing sampling plans, the Goodyear recommended plans and the proposed plans. Quality control workforce requirement is found by converting sample size to manpower with the known
standard time. Total quality cost categories are analyzed and discussed based upon their ratios and t he Pareto Principle. |
| Year | 1979 |
| Type | Thesis |
| School | School of Engineering and Technology |
| Department | Department of Industrial Systems Engineering (DISE) |
| Academic Program/FoS | Industrial Engineering (IE) |
| Chairperson(s) | Pakorn Adulbhan ; Tabucanon, Mario T. |
| Examination Committee(s) | Tang, John C.S. |
| Scholarship Donor(s) | King's Scholarship, Royal Thai Government |
| Degree | Thesis (M. Eng.) - Asian Institute of Technology, 1979 |