"Software engineering" is a term which was coined in the late 1960's as the theme for a workshop on the problems involved in producing software that could be developed economicaLly and would run reliably on real machines. Even now, software engineering is more of a wish than a reality, but the last few years have seen an increased awareness of the need to apply an engineering-type discipline to the design and construction of software systems. Many new proposals have been made for the management of software development and maintenance and many methodologies have been suggested for improving...