About the author Martyn A. Ould read mathematics at Cambridge University, entered the software industry directly, and worked for several years on operating systems. In 1985 he joined Praxis where he is now Quality and Technical Director. His interests centre on methods and lifecycles and he has had three books published-A Practical Handbook for Software Development, Testing in Software Development; and Strategies for Software Engineering. In recent years he has been leading Praxis's work in the field of business process modelling, including undertaking consultancy assignments for major clients. He is a Fellow of the British Computer Society and a Chartered Engineer. His interest in books extends to running his own private press-The Old School Press-where he prints and publishes using metal type and traditional hand processes for illustration and binding. About Praxis Praxis is the software engineering company of Touche Ross Management Consultants. Its services include the modelling of business processes as part of business improvement.