When there is a change in a process, the MaxMin exponentially weighted moving average (EWMA) control chart shows which parameters have increased or decreased. The MaxMin EWMA may also be viewed as smoothed tolerance limits. Tolerance limits are limits that include a specific proportion of the...

Many students entering “Introduction to statistics” feel that statistics is a difficult subject that will have limited benefit to their lives. In this paper, a different vantage point for viewing the statistical process control section of a basic statistics course is presented to demonstrate...

Presents a new procedure for quality control and quality assurance in scenarios where several variables and attributes have to be monitored. The proposed procedure, named integrated process control, begins with the definition of control stations on the production line, where a single chart that...

Herein a cost minimization model with fuzzy multiple goals to determine available alternatives, which will economically enhance the quality of electricity within high‐tech industries is developed. The proposed model focuses on the worsening phenomenon of the quality of electricity within...

This paper describes the quality management function as practiced in highway construction. This function is displayed as an interrelated system, which identifies the main quality activities. Documents and records used in these activities are also reviewed. A model for multilevel quality...

Purpose – The objective of this paper is to demonstrate basic economic principles underlying the use of inspection systems and to derive a basis for comparing inspection costs with the alternative costs of quality improvement. Design/methodology/approach – For this purpose, the impact of...

Purpose – The purpose of this paper is to put forward the view that systems theory, cybernetics, information theory, and dissipative structure theory should be the fundamental principles underlying quality management. These “new sciences” relate to quality management not just in terms of...

Purpose – The paper aims to describe a recently completed research project on the use of statistical quality control (SQC) methods in the context of food and drinks manufacturing. It discusses issues surrounding the successful uptake of such methods, including organisational motivation,...

Purpose – The purpose of this paper is to investigate a new sampling methodology previously proposed for systems with a known lifetime distribution: the Predetermined Sampling Intervals (PSI) method. Design/methodology/approach – The methodology is defined on basis of system hazard...

Purpose – The purpose of the paper is to show that modern markets are characterized by rapidly changing environments and numerous external forces. Under these conditions, product lifetimes are rapidly reducing. Therefore, products require optimum inspection policies to maintain high quality...