The authors explore object-oriented reuse from several perspectives, covering process, methods, technology, architecture, tools, patterns, frameworks and experience. The theme is: objects are neither necessary nor sufficient for effective reuse, but are extremely important if done right.>

The authors propose a stepwise statistical methodology for the study of operating system reliability and associated tools. An example of the application of this method for the ARGOS data processing center of France's CNES is presented. It is shown that each evaluation of software reliability is considered as a special case. Two major consequences are that the reliability models need improvement and that every evaluation must be supported by a statistical analysis of the product and process characteristics.

This paper proposes a method for assessing software reliability models and its application to the Musa and Littlewood-Verrall models. It is divided into two parts.