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Examples Of Software Process Models

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ABSTRACT
Software become an important part of the modern life. In particular, this paper is concerned with various software process models. A software process model is an abstract representation of a process. Software process model is a description of the sequence of different activities carried out in a software engineering project, and the relative order of these activities. In this paper we will discuss waterfall model, prototype model, Iteration model, V-shaped model, agile model. Therefore, the main objective of the paper is to describe these models and their different techniques that will help the developer to use these model according to the situation and to fulfill user or …show more content…

Little flexibility and adjusting scope is difficult and expensive.
3. Software is developed during the implementation phase, so no early prototypes of the software are produced.
4. This Model does not provide a clear path for problems found during testing phases.
Agile model
Agile development model is also a type of Incremental model. Software is developed in incremental, rapid cycles. This results in small incremental releases with each release building on previous functionality. Each release is thoroughly tested to ensure software quality is maintained. It is used for time critical applications. Extreme Programming (XP) is currently one of the most well-known agile development life cycle model.
We have to use agile model in the following cases, such as - 1) when new changes are needed to be implemented. 2) To implement a new feature the developers need to lose only the work of a few days, or even only hours, to roll back and implement it. 3) Unlike the waterfall model in agile model very limited planning is required to get started with the project.
Advantages of Agile Model:
 Customer satisfaction by rapid, continuous delivery of useful software.
 People and interactions are emphasized rather than process and tools. Customers, developers and testers constantly interact with each …show more content…

 There is lack of emphasis on necessary designing and documentation.
 The project can easily get taken off track if the customer representative is not clear what final outcome that they want.
 Only senior programmers are capable of taking the kind of decisions required during the development process. Hence it has no place for newbie programmers, unless combined with experienced resources.
Spiral model
Similar to the incremental model with more emphases placed on risk. It has four phases: Planning, Risk Analysis , Engineering and Evaluation. Requirements are gathered during the planning phase. In the risk analysis phase, a process is undertaken to identify risk and alternate solutions, A prototype is produced at the end of this phase. Software is produced in the engineering phase along with testing at the end of the phase. The evaluation phase allows the customer to evaluate the output of the project to date before the project continues to the next spiral. angular component represents progress, and the radius of the spiral represents

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