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SYSTEMS DEVELOPMENT LIFE CYCLE:
SDLC's Phases
SDLC's First Phase
SDLC's Second Phase
SDLC's Third Phase
SDLC's Fourth Phase
SDLC's Fifth Phase
Managing the Information Systems Project
Gantt Chart
Pert Chart
 
SDLC's Phases

• PLANNING
• ANALYSIS
• DESIGN
• IMPLEMENTATION
• MAINTENANCE
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SDLC's First Phase

PROBLEM RECOGNITION
• Major Function    :    Establishing that a problem exists.
• Output                   :    Feasibility study.
• Tasks                    :    A user notifies an analyst that a problem exists.
Feasibility Study
Major Function :
To define the problem and determine whether or not a new system is feasible.

Output :
Feasibility Study.

Principal Tools :
Fact-gathering techniques and requirements estimation.

Tasks :
1. Collecting information about the problem.
2. Developing possible solutions.
3. Developing more precise estimates of requirements for the analysis phase to follow.
4. Management decides to continue the project or not.
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SDLC's Second Phase

ANALYSIS
Major Function :
To determine the requirements of a proposed new system.

Output :
Problem specification.

Tools :
Principal

Tasks :
1. Studying documents of the current system in order to understand both its flaws and its strong points.
2. Preparing a list of requirements for a new system.
3. Preparing a prototype of the system.
4 .The analyst diagrams the functions of the new system without specifying exactly how those functions are performed.
 

AN EXAMPLE FOR DATA FLOW DIAGRAM
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SDLC's Third Phase

Design
Major Function :
Design a new system

Output :
Design specifications

Principal Tools :
• Data flow diagrams
• Data models
• System models
• Prototyping

Personnel and Tasks :
• Order hardware and software
• Transform into hierarchy
• Incorporate security
• Design input and output
• Design database

Work Flow Chart Example
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SDLC's Fourth Phase

Implementation
Major Function :
Write and test program

Output :
Coded and tested programs User documentation Training materials

Personnel and task :
• Prepare site
• Write programs
• Test programs
• Prepare documentation and t raining
• Enter new data . Begin using system
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SDLC's Fifth Phase

Maintenance
Major Function :
Repair and upgrade the system

Output :
Updated program User documentation Revised programs

Personnel and Task :
• Recognize problem
• Prepare incremental model
• Decide whether to implement
• Modify documentation
• Modify programs
• Test programs
• Use modified system
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Managing the Information Systems Project

• Project
• Deliverable
• Project Management
• Project Initiation
• Project Planning
• Work Breakdown Structure
• Gantt Chart
• Pert Chart
• Project Execution
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Gantt Chart
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Pert Chart
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