Electronic commerce is rapidly replacing the old ways of doing business. Although many studies have been conducted on the adoption of various forms of e-commerce, there are few on this topic in African countries; in particular, there is no research on Tanzania. Therefore, this paper analyzes the...

This paper presents applications of the log-linear ROCOF and the power law process to model the failure rate and estimate the economically optimal replacement time of the individual pipes in a water distribution system. The performance of the two failure rate models is examined using the...