Process and reusability in object-oriented programming

Object-oriented programming provides a very significant step forward in the technology of program building because it provides for the expression in the software itself of architectural information. Object-oriented programs have design-like qualities. In OOP there is an extra dimension of description (the hierarchy) as well as the expressivity provided by subclassing (`is rather like´) and dynamic binding. The author has been trying out these ideas in the domain of VLSI and PCB routing, a demanding problem of great practical importance. He has worked from the literature, and with a team who are designing and implementing routers in a conventional way. The result is a series of routers, a kit of parts and a generic router. Currently the system contains 90 classes and 480 methods