Iterative Incremental Development Model is a process where creating requirements, designing, building and testing a system in small parts. This model divided into small parts which will help to make modules very easily. In this model, module passes through some phases like requirements, coding, designing, testing. Iterative Incremental Development model is well known as well as easy to use. Using this model, some part of the system which is built can show to the customer and get some suggestion from it.
Aug 1, 2013 - 1 Process Models Chapter 3. The primary advantage is that it encourages development of software in a systematic. Problems or disadvantages 1. 14 Prototype Model Customer defines objective to software engineer, but not. 29 The Concurrent development model Definition: It defines software.
This model is useful if we have complete requirements as well as resources to make it. Mostly use for the small project and if customers have requirements to give some output after every phase, so this is a suitable model for them.
For Example:
In this diagram, we are adding every row incrementallyand work until work is complete. Likewise, we develop software in parts. After complete second module, it integrates with the first module and so on.
Diagram of IterativeIncremental model:
Example of Iterative Incremental Development Model
Prototyping
Rapid Application Development
Rational Unified Process
Agile Development Model
Advantages of Iterative Incremental Development Model:
After complete first module can get responses from customers.
Less risky, Handle risk easily because creating software in parts.
We can make working software’s part in an early stage.
This model is less costly as well as more flexible compared to other modules.
Delivery cost is less.
Disadvantage of Iterative Incremental Development Model:
Cost more than waterfall Model.
Needs complete requirement and resources to make complete software.
Cannot predict whole software’s structure in this model.
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Related
There are a number of advantages and disadvantages with regards to the spiral model. The spiral model is a traditional agile model which contains 4 different stages:Planning, Risk Analysis, Engineering and Evaluation. Software projects are constantly passing through phases in iterations,in other words spirals. The baseline spiral, starting in the planning phase, requirements are gathered and risk is assessed. Each subsequent spirals builds on the baseline spiral.
diagram of Spiral model:
Advantages of Spiral model:
High amount of risk analysis hence, avoidance of Risk is enhanced.
Good for large and mission-critical projects.
Strong approval and documentation control.
Additional Functionality can be added at a later date.
Software is produced early in the software life cycle.
Project estimates in terms of schedule, cost etc become more and more realistic as the project moves forward and loops in spiral get completed.
It is suitable for high risk projects, where business needs may be unstable. A highly customized product can be developed using this.
Disadvantages of Spiral model:
Can be a costly model to use.
Risk analysis requires highly specific expertise.
Project’s success is highly dependent on the risk analysis phase.
Doesn’t work well for smaller projects.
It is not suitable for low risk projects.
May be hard to define objective, verifiable milestones.
Overall, I feel that the advantages of the agile spiral model outweigh the disadvantages. This agile method is safer than the older ways of implementing IS projects eg. the Waterfall model. Unlike other models, at every stage risk analysis is performed… The Spiral Model works by building progressively more complete versions of the software by starting at the center of the spiral and working outwards. With each loop of the spiral, the customer evaluates the work and suggestions are made for its modification. As a result, the customer is constantly communicating with the specialist’s, who in turn make changes to the system based on the customers demand. This leads to an increase in customer satisfaction as customer’s can can now interact and control they’re information system’s.