...Sang‐Chan Park; Sang‐Chul Lee; Hironobu Kawamura; Ken Nishina; Masanobu Higashide; Tomomichi Suzuki Purpose This paper aims to clarify adequate control characteristics for using a control chart on the basis of a case study of the low‐pressure chemical vapor deposition (LPCVD) process, which is one...

...Hsin‐Hung Wu The target costing technique, mathematically discussed by Sauers, only uses the C_p index along with Taguchi loss function X − R control charts to set up goal control limits. The new specification limits derived from Taguchi loss function is linked through the C_p...

...Sinsup Cho; Jeong Hyeong Lee On control chart, one may use regression, cusum and exponential smoothing methods to detect any change in the trend of the process. When the data is observed with equally spaced time interval we show how to obtain the estimates of the trend for each method. Three...

...Yumin Liu; Jichao Xu; Hasan Akpolat Multivariate Exponentially Weighted Moving Average (MEWMA) chart is a control chart under multivariate process based on the idea of EWMA that rapidly detects small dispersion with a trend. the MEWMA chart was first time discussed by Woodall. However, in his study...

.... The X control chart is thus used to signal the special cause. It is demonstrated that the expressions for the expected cycle time and the expected cycle cost are easier to obtain by the proposed approach than by adopting that in Collani, Saniga and Weigang (1994). Furthermore, this approach would...

.... The X control chart is thus used to signal the special cause. It is demonstrated that the expressions for the expected cycle time and the expected cycle cost are easier to obtain by the proposed approach than by adopting that in collani, Saniga and Weigang (1994). Furthermore, this approach would...