b shaped model
TRANSCRIPT
Edited By: Jasour A.Obeidat
Supervised By:
Dr. Hebah Nassir dean
Middle East University Faculty of IT Department of CIS Master Program 2012-2013
This presentation edited as a requirement assignment in Information System Development “ISD: 40201722 ” course
Information System Development : 40201722 (2012-2013) 1
Flow of contents
• Introduction.
• “b” Shaped Model illustration.
• “b” Shaped Model phases.
• “b” Phase: Inception.
• “b” Phase: Analysis & Design.
• “b” Phase: Operation & Production.
• “b” Shaped Model Advantages.
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Introduction
• The “b” shaped model Devised by Birrell and Ould.
• The whole of system development life cycle in this model presented as a vertical line and leads to:
Maintenance cycle at the bottom.
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Introduction (CON’T)
• Each stage of the model is important and no stage independent of the others.
• Analysts need to be aware of all other stages in the life cycle and not their part of it.
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“b” Shaped Model illustration
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Note: Double arrow between each phase.
Whole Sequence = b letter
Information System Development : 40201722 (2012-2013)
“b” Phase- Inception
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• The “b” model life cycle begin with inception.
• This phase represent identification of the need for a new computer system.
• Inception -> Analysis
Information System Development : 40201722 (2012-2013)
“b” Phase- Analysis.
• The objectives of the Analysis phase are:
Define the problem.
Create detailed specification of what system have to do?
To agree with customer about the level of service and performance .
Defining the feasibility study in order to commit project resources .
Analysis -> Design
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“b” Phase- Design.
• The objectives of Design phase are:
Define the structure and content of system.
Specify how the system will be implemented?
Within this phase we design :
Design -> Production
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Interfaces Dialogues Input Output
“b” Model Phase: Production.
• During this phase :
Code is created.
Code is tested.
Manuals and Documentation published.
Data from previous system are converted formally to be used by the new one.
Training courses designed and implemented.
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Any testing at this stage is conducted by client to make sure is it close to what they requested ???
“b” Model Phase: Operation
• After Completing Development System “goes alive”.
• Operation phase started by using the system in the business which leads for system evaluation.
• In this time “Maintenance Cycle” started by making inception of ideas and improvements over the system.
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“b” Shaped Model Advantages
• Flexible by its interaction with system requirements.
• More than one change may be moving through maintenance cycle at the same time.
• Possibility in making reverse to the previous phase if any error occur.
•
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“b” Shaped Model Disadvantages
• Slow in change; for each modification there are another analysis and design phase for new requirements associated with change which leads for investigation and understood again.
• What can we say else ….?????
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The End
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