pg. 1 Systems Development Life Cycle (SDLC) Systems Analyst – change agent Systems Analyst – change agent  coordination, communication, planning, design Multistep process or cycle - some reason Multistep process or cycle - some reason  Highly related and interdependent  Occur at same time  Different parts in different stages  Recycle back  Automating some of the steps

pg. 2 Systems Development Cycle Systems Implementation Product: Operational System Systems Implementation Product: Operational System Systems Investigation Product: Feasibility Study Systems Investigation Product: Feasibility Study Systems Analysis Product: Functional Requirements Systems Analysis Product: Functional Requirements Systems Design Product: System Specifications Systems Design Product: System Specifications Systems Maintenance Product: Improved System Systems Maintenance Product: Improved System Understand the Business Problem or Opportunity Develop an Information System Solution Implement the Information System Solution

pg. 3 Investigation - brief study Investigation - brief study  Proposals – preliminary study  Symptoms/Problem/Opportunity  Feasibility study  Cost/benefit Tangible/intangibleTangible/intangible

pg. 4 Analysis – in-depth study – system should do to meet user needs - how system will accomplish Analysis – in-depth study – system should do to meet user needs - how system will accomplish  Understand existing system, set requirements  Gather and analyze data  Organizational Current systemCurrent system Functional requirementsFunctional requirements –Information needs –Processing capabilities required Design - actually plan system Design - actually plan system  Satisfy functional requirements from analysis

pg. 5  User interface – input, output, converting to machine  Tips  Prototyping process (RAD) Limited working system, developed quicklyLimited working system, developed quickly  Data design  Databases and files  Data dictionary  Process design  Software resources – programs and procedures  Systems specifications

pg. 6 Implementation Implementation  Conversion  HW and SW Acquisition  SW development  Testing  Documentation  Installation  Education and training

pg. 7  Converting - stress and confusion  Parallel - old and new  Pilot - entire system - selected users  Phasing - part of system - all users  Plunge (cutover, direct) Maintenance Maintenance  Monitoring, evaluating, modifying

pg. 8 CASE – computer-aided systems engineering – software tools CASE – computer-aided systems engineering – software tools  Uses  Business planning  Project management  User-interface  Database design  Software development

pg. 9  Front end – planning, analysis, design  Back end – implementation, maintenance  Data dictionary  JAD – joint application design  End-user development