The Study of Determining the Optimum Process Mean and Screening Limits

• Main Author: 吳龍志
• Other Authors: 陳忠和
• Format: Others
• Language: zh-TW
• Published: 2004
• Online Access: http://ndltd.ncl.edu.tw/handle/14897618428078546555

碩士 === 南台科技大學 === 工業管理研究所 === 92 === In this paper, we present a modified Lee et al.’s model for determining the optimum process parameters. There are three grades for the product after 100% inspection, that is, rework, conformance, and scrap. The under-filled product is scrapped, the conformance product is stored and sold for a fixed price, and the over-filled product is reworked. Two situations of the rework cost are considered. One is the constant and the other one is the linear reprocessing cost. Both the perfect rework and the imperfect rework processes for the product are proposed in the modified model. The accepted item has the storehouse cost which is related with the storehouse time. Assume that the storehouse time is truncated normal distributed. When the performance variable is impossible to measure directly, we need to adopt the surrogate one. Assume that the latter is highly correlated with the former. The objective of this study is to find the optimum process mean of performance variable and screening limit of surrogate variable for obtaining the maximum expected profit per the item.