Increasing competitive pressure in all business sectors (e.g. private, public SME) is reflected in the continuing quest for business improvement philosophies and methodologies to address this challenge. Recent developments have included increased organisational and academic interest in the six...

Six Sigma is now increasingly applied to a variety of processes ranging from manufacturing to service and variegated transactional processes. Six Sigma has been proved to be a rigorous pursuit of the reduction of process variation and defect rate in all critical business processes to achieve...

Six Sigma is a disciplined approach to define, measure, analyse, improve and control processes that result in variability and defect reduction. Although Six Sigma has been widely embraced by many world class manufacturing companies, it is still new in the software industry. This paper initially...

Asserts that for many organizations the key to management survival is to maintain performance equilibrium. Notes that management systems have essentially remained unchanged for many decades. Companies organize into functional groups with a hierarchical chain of command, they set strategic...

The influence of the estimation of parameters in Shewhart control charts is investigated. It is shown by simulation and asymptotics that (very) large sample sizes are needed to accurately determine control charts if estimators are plugged in. Correction terms are developed to get accurate...

Measurement error is a usually met distortion factor in real-world applications that influences the outcome of a process. In this paper, we examine the effect of measurement error on the ability of the EWMA control chart to detect out-of-control situations. The model used is the one involving...

Owing to the extreme quantiles involved, standard control charts are very sensitive to the effects of parameter estimation and non-normality. More general parametric charts have been devised to deal with the latter complication and corrections have been derived to compensate for the estimation...

Quality improvement is understood by Juran to be the systematic pursuit of improvement opportunities in production processes. Several methodologies are proposed in literature for quality improvement projects. Three of these methodologies – Taguchi's methods, the Shainin system and the Six...