In many production processes, monitoring the ratio of two normal random variables (RZ)
plays an important role in ensuring product quality. In recent years, flexible manufacturing …

Control charts are usually designed using average run length as the criterion to be
optimized. The shape of the run length distribution changes according to the shift in the …

The design of appropriate and successful quality-inspection strategies plays an important
role within manufacturing organizations. It is one of the leverage factors to ensure customers …

This article proposes a new control chart (called the ABS SPRT chart) for Statistical Process
Control (SPC) based on Sequential Probability Ratio Test (SPRT). This chart is able to …

At the start of a production run, the parameters of the distribution of a quality characteristic
are frequently unknown. If the quality characteristic should by monitored on-line by means of …

In the production of small batches of customized parts, high flexibility and frequent switching
of production from one product variant to another could not allow for the implementation of a …

This paper proposes an economic model for the synthetic chart. The synthetic chart is an
integration of the chart and the CRL chart. A simplified algorithm to obtain the optimal …

Purpose–The purpose of this paper is to develop an extensive economic production quantity
(EPQ) model on the basis of previous research. Considering an imperfect three‐state …

The Sequential Probability Ratio Test (SPRT) chart is a very effective control chart. It is much
faster to detect out-of-control cases compared with the X¯ and CUSUM charts, even their …

This paper proposes an economic model for the design of an SPRT (Sequential Probability
Ratio Test) chart for monitoring the process mean in short-run production. The model …