System Development Life Cycle & Implementation of MIS

System Development Life Cycle&

Implementation of MISGeorge V James

CONTENTS

What is SDLC?Stages in SDLCImplementation of MISSteps in Implementation of MIS

What is SDLC?Stages in SDLCImplementation of MISSteps in Implementation of MIS

What is SDLC?Mainly used in Systems Engineering,

Information Systems & SoftwareEngineering. A process of creating, or altering

information systems, and the models &methodologies used to develop thesystems.

Mainly used in Systems Engineering,Information Systems & SoftwareEngineering. A process of creating, or altering

information systems, and the models &methodologies used to develop thesystems.

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

Model of the SystemDevelopment Life Cycle

1. Systems InvestigationAssesses feasibility and practicality of systemDetermine if a new system is neededFive primary tasks:

1. List problems, opportunities and directives2. Negotiate preliminary scope3. Assess project worth4. Plan the project5. Present the project and plan

Assesses feasibility and practicality of systemDetermine if a new system is neededFive primary tasks:

1. List problems, opportunities and directives2. Negotiate preliminary scope3. Assess project worth4. Plan the project5. Present the project and plan

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 Analysis2. Analysis of Present System3. Functional Requirements Analysis

In depth study of old system and identifyingnew system requirements

Defines system from user's view Forms of analysis

1. Organisational Analysis2. Analysis of Present System3. Functional Requirements Analysis

3. Systems DesignDesign new/alternative systemSpecifies how the system will accomplish the

objectives.Consists of design activities to be

implemented that was done earlier in thesystems analysis stage

Systems design consists of 4 major activities:-1. User Interface Design2. Data Design3. Process Design4. System Specifications

Design new/alternative systemSpecifies how the system will accomplish the

objectives.Consists of design activities to be

implemented that was done earlier in thesystems analysis stage

Systems design consists of 4 major activities:-1. User Interface Design2. Data Design3. Process Design4. System Specifications

4. Systems DevelopmentBuild the system to the design specificationsDevelop the software

1. Purchase off-the-shelf software OR2. Write custom software

Acquire the hardwareTest the new system

1. Module (unit) test - tests each part of system2. Integration testing - tests system as one unit

Create manuals for users and operators

Build the system to the design specificationsDevelop the software

1. Purchase off-the-shelf software OR2. Write custom software

Acquire the hardwareTest the new system

1. Module (unit) test - tests each part of system2. Integration testing - tests system as one unit

Create manuals for users and operators

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

5. Systems ImplementationTypes Of Conversion

Direct/plunge/crash approach – entire new systemcompletely replaces entire old system, in one step

Parallel approach - both systems are operated side byside until the new system proves itself

Pilot/location approach - launched new system for onlyone group within the business -- once new system isoperating smoothly, implementation goes company-wide

Phased/staged/incremental approach - individual partsof new system are gradually phased-in over time, usingeither crash or parallel for each piece.

Direct/plunge/crash approach – entire new systemcompletely replaces entire old system, in one step

Parallel approach - both systems are operated side byside until the new system proves itself

Pilot/location approach - launched new system for onlyone group within the business -- once new system isoperating smoothly, implementation goes company-wide

Phased/staged/incremental approach - individual partsof new system are gradually phased-in over time, usingeither crash or parallel for each piece.

IMPLEMENTATIONACTIVITIES

ACQUISATION OF HARDWARE,SOFTWARE & SERVICES

SOFTWARE DEVELOPMENT ORMODIFICATION

END USER TRAININGIMPLEMENTATIONACTIVITIES SYSTEM

DOCUMENTATION

CONVERSION:-PARALLELPHASED

PILOTPLUNGE

6. Systems Maintenance(Operations)

Types of changes undertaken in this phase:-Physical repair of the systemCorrection 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 systemCorrection 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)

IMPLEMENTATION OFMIS

IMPLEMENTATION OFMIS

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 ororganisation.

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 aninformation 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 ororganisation.

2. Cut off the old system and install the new.3. Cut over by segments.4. Operate in parallel and cut over.

Steps in Implementation1. 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).

References

Management InformationSystem- Gordon B. DavisWikipedia.comMIS BlogsSlideshare.net

Management InformationSystem- Gordon B. DavisWikipedia.comMIS BlogsSlideshare.net