This study define the concepts of port logistics service by investigating various elements of port logistics service and grouping them in six attributes using a Data Mining technique. The QFD (Quality Function Deployment) technique is applied to measure

This paper is designed a VSI X-CRL synthetic control chart in aspect of economy. We found the optimal sampling interval and various control limit factors under various cost parameters using cost function, proposed Lorenzen and Vance. Optimal design parame

This paper presents a economic design of synthetic control chart that is an VSI(variable samlping interval) X control chart and conforming run length chart. Computer simulation is carried out for comparing performance of developed control chart with X-CRM synthetic chart. We found that optimal parameter of suggested chart for minimize quality cost. And then a comparison and analysis between synthetic VSI X-CRL chart and X-CRM synthetic chart in the economic aspect. Then VSI X-CRL chart consistently produces smaller quality cost than X-CRM synthetic chart.

Statistical process cintrol is intended to assist operators of a stable system in monitoring whether a change has occurred in the process, and it uses several control charts as main tools. In design and use of control chart, it is rational that probabilit

In this study, we establish bootstrap control limits for robust M-estimator chart by applying the bootstrap method, called resampling, which could not demand assumptions about pre-distribution when the process is skewed and/or the normality assumption is doubt. The results obtained in this study are summarized as follows : bootstrap M-estimator control chart is developed for applying bootstrap method to M-estimator chart, which is more robust to keep Type Ⅰ error when process contain contaminate quality characteristic.