1. 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
Edited By:
Jasour A.Obeidat
Supervised By:
Dr. Hebah Nassir dean
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2. “b” Shaped Model
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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3. “b” Shaped Model
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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4. “b” Shaped Model
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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5. “b” Shaped Model
“b” Shaped Model illustration
Note:
Double arrow between each
phase.
Whole Sequence = b letter
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6. “b” Shaped Model
“b” Phase- Inception
• The “b” model life cycle begin with
inception.
• This phase represent identification of the
need for a new computer system.
• Inception -> Analysis
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7. “b” Shaped Model
“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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8. “b” Shaped Model
“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 :
Interfaces Dialogues Input Output
Design -> Production
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9. “b” Shaped Model
“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.
Any testing at this stage is conducted by client to
make sure is it close to what they requested ???
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10. “b” Shaped Model
“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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11. “b” Shaped Model
“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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12. “b” Shaped Model
“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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13. “b” Shaped Model
The End
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14. “b” Shaped Model
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