An analysis of product development. Systems. Product development. Requirements specifications. Requeriments engineering methods. ISAC change analysis and activity study. Information strategy planning. The entity-relationship approach I: models. The entity-relationiship approach II: methods. Structured analysis I: models. Structured analysis II: methods. Jackson system development I: models. Jackson system development II: methods. Method integration and strategy selection. A framework for requirements engineering I: models. A framework for requirements engineering II: methods. Development strategies. Selecting a development strategy. Answers to select exercises. Cases. An outline of some development methods.