System Development Life Cycle & Implementation of MIS

System Development Life Cycle
&
Implementation of MIS
George V James

CONTENTS
What is SDLC?
Stages in SDLC
Steps in Implementation of MIS
What is SDLC?
Stages in SDLC
Steps in Implementation of MIS

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.

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 System
Development Life Cycle

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

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

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

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

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 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.

IMPLEMENTATION
ACTIVITIES
ACQUISATION OF HARDWARE,
SOFTWARE & SERVICES
SOFTWARE DEVELOPMENT OR
MODIFICATION
END USER TRAINING
IMPLEMENTATION
ACTIVITIES SYSTEM
DOCUMENTATION
CONVERSION:-
PARALLEL
PHASED
PILOT
PLUNGE

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)

IMPLEMENTATION OF
MIS
IMPLEMENTATION OF
MIS

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.

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).

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

System Development Life Cycle & Implementation of MIS

System Development Life Cycle & Implementation of MIS

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System Development Life Cycle & Implementation of MIS