Publisher's Synopsis
Businesses evolve - and with them their computer requirements. Typically, data processing organizations spend 50 to 80 per cent of their available effort on maintaining systems after implementation. It is thus highly desirable to design systems that are amendable to change as business needs develop.;This book explores aspects of systems designed in the context of rapidly evolving businesses. Types of change are examined, and attention is given to costs and others aspects. The requirements spec is explored and approaches requiring expenditure are described (involving software development aids, applications packages, data dictionaries, etc). A strategy for design is profiled with attention to structure (modularity, interfaces, variables files, etc) and the development environment. Aspects of design verification are also discussed.;Causes of change, types of data change and implementation change, qualities of a system and other information are included in the appendices.
