Using students for class Presentation. Course Title: Software Engineering <

1. Spiral Model

2. Spiral Model

3. Application Of Spiral Model

4. FOUR PHASES OF SPIRAL MODEL4
• Planning
• RiskAnalysis
• Engineering
• Evalution

5. PLANNING
• This phase starts with gathering the business
requirements in the baseline spiral.
• Planning includes estimating the cost, schedule
and resources for the iteration.
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6. RISK ANALYSIS
• In this phase analyst assume all the possible risks
that could be occurred during future
development.
• A prototype is produced at the end ofthe risk
analysis phase.
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7. ENGINEERING
• In this phase software is developed,
along with testing at the end of the
phase.
• Hence this phase includes testing,
coding and deploying software at the
customer site.
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8. EVALUATION
• In this phase, Customers evaluate the so
far developed version of the software.
• In the end, planning for the next phase
is started.
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9. When to use Spiral Model
 Whencostsandriskevaluationisimportant.
 Formediumtohigh-risk projects.
 Users areunsureoftheirneeds.
 Requirements are complex.

10. Advantages
 Changing requirements can be accommodated.
 Allowsforextensiveuseofprototypes.
 Requirementscanbecaptured more accurately.
 Users seethesystemearly.
 Early and frequent feedback from users.

11. Disadvantages
 End ofprojectmaynotbeknownearly.
 Not suitableforsmallorlowrisk projectsand could be
expensiveforsmallprojects.
 Process iscomplex.
 Spiralmaygo indefinitely.

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