Ever since the Malcolm Baldrige National Quality Award (MBNQA) was established in 1987, many other countries have developed their own version of a national quality award (NQA). These NQAs tend to follow the general framework of the MBNQA with different emphases on criteria items such as...

When objective decisions are to be made, statistical methods should be used based on any objective information in the form of data collected about a product or process. Statistical techniques such as control charts, process capability indices and design of experiments have been used in the...

Control charts based on geometric distribution have shown to be useful when this is a better approximation of the underlying distribution than the Poisson distribution. The traditional c ‐chart, if used, will cause too many false alarms. It is noted that for geometric distribution, the control...

Traditional attribute control charts are based on the monitoring of the number of nonconforming items in a sample of fixed size. In modern manufacturing processes, since items can be checked automatically, use of samples of a fixed subjective size with traditional charts is not suitable for...

A solid state relay (SSR) is an electrical ON-OFF control device through which the delivery of electrical power to loads is switched either ON or OFF by a small control signal. The device serves the same function as a classical electromechanical relay (EMR) but carries no mechanical switching...

Optimal crew allocation and scheduling is an important issue in the management of a large fleet of taxis. Presents a modelling study of a taxi service operation in a Singapore public transport company, with the results adaptable for other similar operations. Proposes two quantitative techniques:...

Residential electricity consumption in Singapore increased at a rate of 8.8% per year between 1972 and 1990. Estimates of the long-run income and price elasticities are 1.0 and −0.35, respectively. The energy-conservation campaigns that have been launched are found to have marginal effects on...