planning - review project requests , prioritize project requests , allocate resources and form project development team, analysis - conduct preliminary investigation , study current system , determine user requirements , recommend solution , determine user requirement, design - acquire hardware & software if necessary and develop details of system, implementation - develop programs and apps , install and test new system , train users and convert to new system, maintenance - perform maintenance activities , monitor system performance and assess system security, unit test - to verifies that each individual program or object works by itself, system test - to verifies that all programs in an application work together properly, integration test - to verifies that an application works with other applications, acceptance test - to checks the new system to ensure that it works with actual data, direct conversion - user stops using the old system and begins using the new system on a certain date , parallel conversion - consists of running the old system alongside the new system for a specified time, phased conversion - each site converts at a separate time. Larger systems that have multiple sites often use a phased conversion, pilot conversion - only one location in the organization uses the new system-so that it can be test,

system development life cycle (SDLC)

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