Programming through disciplined modification

The paper addresses the issue of safe modification of code, as required in maintenance or in development by reuse. It presents a framework for modeling and recording program development. The framework is based on the notion of planning, workplan, and product. An example of program modification using the development record is detailed; it shows how the framework and the records can be used to drive consistent developments of new functions. We conclude by discussing how development techniques based on analogy and process capture can give a pragmatic and effective answer to the problems of code reuse and program evolution