incremental and iterative stratergy
TRANSCRIPT
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Incremental Delivery
Sushant Kushwaha
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Hello……
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INCREMENTAL MODEL
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STEPS:Construct partial implementation of a total
system.
Then slowly add increased functionality.
Prioritize requirements and implement them in group.
Each subsequent release of the system add functions to the previous ones
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Strengths……Develop high risk and major functionality
first.
Each release delivers an operational product.
Customer can respond to each product.
Uses “Divide and Conquer” paradigm for breakdown .
Initial delivery is faster and of lower cost.
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Weakness…..Requires good planning and designing.
Requires early definition of a complete and fully functional system to allow for the definition of the increment.
Well defined module interface are required
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When to use this model…..A need for early realization of benefit.
A need to get basic functionality to the market early.
Project which have lengthy development schedule.
Project with new Technology.
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Iterative DevelopmentDevelop, then evaluate, then change, …
Never expected it to be right.
Iterate to find the right solution.
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Iterative Development
Iteration means the act of repeating a process usually with the aim of approaching a desired goal or target or result. Each repetition of the process is also called an “iteration”, and the results of one iteration are used as the starting point for the next iteration.
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1st Iteration
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2nd Iteration
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3rd Iteration
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4th Iteration
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Incremental developmentIncrementally add software a time
Build up functionality gradually
Release incrementally so that we actually get that business value we're chasing.
We don't really get return on investment till people begin to use the software we've built.
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Incremental developmentIncrementalism is a method of working by
adding to a project using many small, incremental changes instead of a few (extensively planned) large jumps.
It means you develop one part of the system and when it’s ready you develop the next part
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1st Increment
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2nd Increment
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3rd Increment
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4th Increment
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Putting both together……Incremental development goes through all the phases of
development (analysis, testing, development, design, integration, production) it is a perfect tool to expose all problems in the process.Incrementalism improves the process and adds new topics.
Iterative process means rework on the existing product.Iterativity improves the product
Both can be used without each other but they can be used together as well.
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1st Increment and 1st Iteration
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1st Increment and 4th Iteration
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2nd Increment and 4th Iteration
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3rd Increment
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4th Increment