This revised and updated edition provides a detailed description and discussion of the processes of information systems development and management. For those specializing as technical experts, it shows where their speciality fits into the overall effort that an organization makes when it sets out to build information systems. For those who specialize in management, it provides an insight into the effort that is involved in information systems development and relates the development activity to broader concerns of information management.The approach proceeds from a simple description of fundamental development tasks within a life-cycle perspective, to a critical presentation of current practices and their theoretical foundations.