Monday 9 November 2020

These phases have their own unique function and purpose

 

1. Waterfall Model

 

This is the most basic process of software development life cycle that is widely followed in the industry. Here the developers follow the order of the process in which the flow is getting to the final destination. It's like a waterfall where there are a number of stages.

 

These phases have their own unique function and purpose. There is, in fact, the four phases - requirements gathering and analysis phase, software design, implementation and testing of programmed maintenance. The fourth phase of this came one by one in the order given.

 

In the first stage all the system requirements are likely to develop certain software recorded and analyzed.

Documents created that action into the next stage of the software design phase. What needs to be emphasized here is that once you move to the next stage will not be possible to update the requirements. So you have to be very careful and cautious about the needs of the end user.

 

profit

 

Easy to implement and maintain.

The initial stage of requirements and a strict monitoring system helps save time later in the development stage

minimal resource requirements and tests are carried out after the completion of each stage.

deficiency

 

It is not possible to modify or update its terms

You can not make changes after you to the next stage.

Unable to start the next stage until the previous stage is completed

2. V Model

 

This model is widely recognized as superior to the waterfall model. Following the development activities and the implementation of the tests performed on side by side in the form of downhill and uphill. In this model, testing began at the unit level and spread toward the integration of the entire system.

 

 

 

So, SDLC is divided into five stages - unit testing, integration testing, regression testing, system testing and acceptance testing.

 

profit

 

Easy to use models since activities such as planning and design of experiments testing is done before coding

Save time and improve your chances of success.

Defects are mostly found in the early stages and flow downward from defects generally avoided

deficiency

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It is a rigid model

Early prototypes of this product is not available for software developed during the implementation phase

If there is a change in the middle of the road, then a test document needs to be updated

3. The Agile Model

 

 

profit

 

Ensure customer satisfaction with rapid development and continuous submission.

It is a flexible model as customers, developers and testers constantly interact with one another

working software can be developed quickly and the product can be adapted to changing needs on a regular basis

deficiency

 

In the case of software development of large and complex it becomes difficult to assess the effort required at the beginning of the cycle

Due to constant interaction with customers, the project can go off track if customers are not clear about the purpose

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4. Spiral Model

 

It is more like Agile models, but with a greater emphasis on risk analysis. It has four stages - planning, risk analysis, and evaluation techniques. Here gather requirements and risk assessment carried out on the ground level and each spiral on build on it.

 

 

 

profit

 

chance of risk aversion increased because of the importance of risk analysis.

Its a good model for large and complex systems.

Depending on the changed circumstances additional functionality can be added at a later date

Software produced at the beginning of the cycle

deficiency

 

Its models are expensive and require highly specialized expertise in risk analysis

It does not work well in simple projects

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5. Rational Unified Process

 

This model also consists of four phases, each arranged in a number of separate iterations. The difference with other models is that each iteration must separately meet the criteria set before the next step is done.

 

profit

 

With an emphasis on accurate documentation of this model is able to resolve the risks associated with the changing needs of clients

Integration takes less time as the process throughout the SDLC.

deficiency

 

The biggest disadvantage is that the team members need to be an expert in their niche.

In large projects the continuous integration, may cause confusion

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6. The rapid application development

 

This is another incremental models such as Agile models. The following components are developed in parallel with each other. Then assembled into product development.

 

profit

 

The development time is reduced due to the simultaneous development of parts and components can be reused

Many integration problems solved because of the integration of early stage

 

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deficiency

 

It requires a strong team of developers is very capable with individual success in identifying business needs

It is a model based modules, which can be modularized so that the system can only be developed in this model

Such as high cost, this model is not suitable for projects cheaper

 Conclusion

 

Model testing software mentioned above is part of the SDLC process. With the increasing awareness and demand for information technology, has delivered more than 100+ types of tests used today in many large companies. This process is constantly changing to suit the requirements, project and preferences.


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