System Development Life Cycle & Implementation of MIS

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System Development Life Cycle & Implementation of MIS

  1. 1. System Development Life Cycle & Implementation of MIS George V James
  2. 2. CONTENTS What is SDLC? Stages in SDLC Implementation of MIS Steps in Implementation of MIS What is SDLC? Stages in SDLC Implementation of MIS Steps in Implementation of MIS
  3. 3. What is SDLC? Mainly used in Systems Engineering, Information Systems & Software Engineering.  A process of creating, or altering information systems, and the models & methodologies used to develop the systems. Mainly used in Systems Engineering, Information Systems & Software Engineering.  A process of creating, or altering information systems, and the models & methodologies used to develop the systems.
  4. 4. Stages/Phases of Life Cycle  Systems Investigation  Systems Analysis  Systems Design  Systems Development  Systems Implementation  Systems Maintenance  Systems Investigation  Systems Analysis  Systems Design  Systems Development  Systems Implementation  Systems Maintenance
  5. 5. Model of the System Development Life Cycle
  6. 6. 1. Systems Investigation Assesses feasibility and practicality of system Determine if a new system is needed Five primary tasks: 1. List problems, opportunities and directives 2. Negotiate preliminary scope 3. Assess project worth 4. Plan the project 5. Present the project and plan Assesses feasibility and practicality of system Determine if a new system is needed Five primary tasks: 1. List problems, opportunities and directives 2. Negotiate preliminary scope 3. Assess project worth 4. Plan the project 5. Present the project and plan
  7. 7. 2. Systems Analysis  In depth study of old system and identifying new system requirements  Defines system from user's view  Forms of analysis 1. Organisational Analysis 2. Analysis of Present System 3. Functional Requirements Analysis  In depth study of old system and identifying new system requirements  Defines system from user's view  Forms of analysis 1. Organisational Analysis 2. Analysis of Present System 3. Functional Requirements Analysis
  8. 8. 3. Systems Design  Design new/alternative system  Specifies how the system will accomplish the objectives.  Consists of design activities to be implemented that was done earlier in the systems analysis stage Systems design consists of 4 major activities:- 1. User Interface Design 2. Data Design 3. Process Design 4. System Specifications  Design new/alternative system  Specifies how the system will accomplish the objectives.  Consists of design activities to be implemented that was done earlier in the systems analysis stage Systems design consists of 4 major activities:- 1. User Interface Design 2. Data Design 3. Process Design 4. System Specifications
  9. 9. 4. Systems Development  Build the system to the design specifications  Develop the software 1. Purchase off-the-shelf software OR 2. Write custom software  Acquire the hardware  Test the new system 1. Module (unit) test - tests each part of system 2. Integration testing - tests system as one unit  Create manuals for users and operators  Build the system to the design specifications  Develop the software 1. Purchase off-the-shelf software OR 2. Write custom software  Acquire the hardware  Test the new system 1. Module (unit) test - tests each part of system 2. Integration testing - tests system as one unit  Create manuals for users and operators
  10. 10. 5. Systems Implementation  Installing the system  Convert from old system to new system  Train end users  Compile final documentation  Testing & Evaluating the new system  Installing the system  Convert from old system to new system  Train end users  Compile final documentation  Testing & Evaluating the new system
  11. 11. 5. Systems Implementation Types Of Conversion  Direct/plunge/crash approach – entire new system completely replaces entire old system, in one step  Parallel approach - both systems are operated side by side until the new system proves itself  Pilot/location approach - launched new system for only one group within the business -- once new system is operating smoothly, implementation goes company-wide  Phased/staged/incremental approach - individual parts of new system are gradually phased-in over time, using either crash or parallel for each piece.  Direct/plunge/crash approach – entire new system completely replaces entire old system, in one step  Parallel approach - both systems are operated side by side until the new system proves itself  Pilot/location approach - launched new system for only one group within the business -- once new system is operating smoothly, implementation goes company-wide  Phased/staged/incremental approach - individual parts of new system are gradually phased-in over time, using either crash or parallel for each piece.
  12. 12. IMPLEMENTATION ACTIVITIES ACQUISATION OF HARDWARE, SOFTWARE & SERVICES SOFTWARE DEVELOPMENT OR MODIFICATION END USER TRAINING IMPLEMENTATION ACTIVITIES SYSTEM DOCUMENTATION CONVERSION:- PARALLEL PHASED PILOT PLUNGE
  13. 13. 6. Systems Maintenance (Operations) Types of changes undertaken in this phase:-  Physical repair of the system  Correction of new bugs found (corrective)  System adjustments to environmental changes(Systems Audit)  Adjustments for users’ changing needs (adaptive)  Changes to user better techniques when they become available (perfective) Types of changes undertaken in this phase:-  Physical repair of the system  Correction of new bugs found (corrective)  System adjustments to environmental changes(Systems Audit)  Adjustments for users’ changing needs (adaptive)  Changes to user better techniques when they become available (perfective)
  14. 14. IMPLEMENTATION OF MIS IMPLEMENTATION OF MIS
  15. 15. Introduction • After the design & development process of an information system, comes it implementation. • By implementation, it means to put the system to work. • There are 4 basic methods of implementation of MIS: 1. Install the system in a new operation or organisation. 2. Cut off the old system and install the new. 3. Cut over by segments. 4. Operate in parallel and cut over. • After the design & development process of an information system, comes it implementation. • By implementation, it means to put the system to work. • There are 4 basic methods of implementation of MIS: 1. Install the system in a new operation or organisation. 2. Cut off the old system and install the new. 3. Cut over by segments. 4. Operate in parallel and cut over.
  16. 16. Steps in Implementation 1. Planning the implementation activities. 2. Acquiring and laying out facilities and offices. 3. Organising the personnel for implementation. 4. Developing procedures for installation and testing. 5. Developing the training program for operating personnel. 6. Completing the system’s software. 7. Acquiring the required hardware. 8. Generating files. 9. Designing forms. 10.Testing the entire system. 11.Complete cutover to the new system. 12.Documenting the new system. 13.Evaluating the MIS. 14.Providing System Maintenance (debugging & Improving). 1. Planning the implementation activities. 2. Acquiring and laying out facilities and offices. 3. Organising the personnel for implementation. 4. Developing procedures for installation and testing. 5. Developing the training program for operating personnel. 6. Completing the system’s software. 7. Acquiring the required hardware. 8. Generating files. 9. Designing forms. 10.Testing the entire system. 11.Complete cutover to the new system. 12.Documenting the new system. 13.Evaluating the MIS. 14.Providing System Maintenance (debugging & Improving).
  17. 17. References Management Information System- Gordon B. Davis Wikipedia.com MIS Blogs Slideshare.net Management Information System- Gordon B. Davis Wikipedia.com MIS Blogs Slideshare.net

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