(System Development Life Cycle) Building the MIS System Concepts (System Development Life Cycle)

A System Consists of elements which operate together according to some procedures and within some boundaries to achieve a particular goal. The basic model is input, process and output.

The Organization as a System: Control Plans Programs Policies Strategies External Control The Organization as a System: Input Manager Money Materials Machines + Information Organization Output Goals/Objectives Profitability Productivity Growth Innovation Employee Development The Computer MIS Measure performance against plan

Three stages of systems approach Definition Understand the business problem or opportunity. Development Develop an information system solution. Installation and operation Implement the information system solution.

Definition Feasibility Study Requirements Collection and Analysis Conceptual Design

Development Design Physical system design Physical database design Input design Output design Physical database design File design Database design Program Development Procedure Development

Installation and Operation Conversion Operation and Maintenance Post audit

in its Development Cycle Journey of a “System” in its Development Cycle

System Development life Cycle (SDLC) It holds that systems are best developed through the use of a systematic development approach. The systems development life cycle (SDLC) is a conceptual model used in project management. It describes the stages involved in an information system development project, from an initial feasibility study through maintenance of the completed application.

Steps in SDLC

System Investigation Following are the three activities in this stage: System planning and selection Feasibility study Feasibility report There are four types of feasibilities: Organizational Economic Technical Operational

System Analysis Following are the four activities in this stage: Analysis of the organizational environment Analysis of any present systems System requirement analysis System requirements report

System Design System design can be viewed as the design of User interface design (Screen, form, reports and dialog design) Data design (Data element structure design) Process design (Program and procedure design)

System Implementation It involves Hardware and software acquisitions Software development Testing of programs and procedures User training Development of documentation Various installation activities

System Maintenance It involves Monitoring Evaluating Modifying of a system to make desirable or necessary improvements It also includes post-implementation review process for any new requirement.

Final SDLC Maintenance Cycle Testing Cycle Systems Investigations Analysis Systems Design Systems Implementations Systems Maintenance Product: Feasibility Study Product: System Requirements Product: System Specifications Product: Operational System Product: Improved System