Prototyping a microcomputer-based online library catalog
Susan Smernoff Lazinger, Peretz Shoval · Illinois Digital Environment for Access to Learning and Scholarship (University of Illinois at Urbana-Champaign) · 1987
phase-feasibility-and follow it with specification, design, programming, test, implementation; HICE, ET AL., concentrating on data processing system development, call their phases: definition, preliminary design, detail design, program and human job development, testing, data conversion and system implementation, and system operation and maintenance.5 Wyllys then proceeds to add his own contribution to the welter of definitions of the phases of the system development cycle: "Here the phases will be called: analysis, design, production, implementation, and operation."6 Since his five-step definition is nonetheless an attempt to standardize the vocabulary of systems development it seems an appropriate framework for describing the phases in the development life cycle in a bit more detail.In the analysis phase, the system design team begins by defining the overall purpose of the existing system and of the changes desired-i.e., the requirements for the new system.In identifying system requirements, various