Purpose – This paper aims to present a quality and business improvement framework based on Six Sigma/design, measure, analyze, improve, and control (DMAIC); design for Six Sigma (DFSS); and Lean principles. An historical perspective on these methods is also provided....

This paper introduces a one-sided multivariate exponentially weighted moving average (MEWMA) chart for detecting an increase in a process mean. The control limits are based on the multivariate Poisson distribution and have applications for both industrial processes and public health data. The...

Erratum To "Economic Design of Fraction Defective Control Charts" By Montgomery, Heikes and Mance, Management Sci. 21 (11, July) (1975).

An expected cost model for the fraction defective control chart for the case where there are several out-of-control states is developed. A procedure is presented for determining the sample size, control limit or critical region, and interval between samples which minimizes the expected cost of...

An approximate cost model for a quality control procedure for two or more related variables is investigated. A method is presented to determine the optimal sample size, interval between samples, and critical region parameter for the Hotelling T² control chart. This model is a multivariate analog...

A model-based approach to the forecasting of short-range product demand within the semiconductor industry is presented. Device-level forecast models are developed via a novel two-stage stochastic algorithm that permits leading indicators to be optimally blended with smoothed estimates of...