Software development life cycle and phases

We cannot start the next phase unless and until the previous phase is completed. Inappropriate for complex projects. Small details remain unnoticed. This model is based on the principle of repetition. Developers first create an initial basic version of the software rapidly and then after testing and reviewing it, they improve the software in tiny stages or iterations. Appropriate for complex projects. The development is simple to track.

Control on Risks. If left checked, the process will quickly deplete resources. Can be tricky to manage. Not suitable for small projects. The Spiral model is the most flexible model amongst all the models. The spiral model goes through the planning, analysis, development, and testing phases , gradually improving each time. Due to the greater amount of Risk Analysis, prevention of Risk can be improved. Good for large and detailed-oriented projects. Can easily be documented and approved. Highly trained professionals are required for Risk Analysis.

Not suitable for small-sized projects. V- Model is also known as the? Verification and Validation? It is an add-on to the waterfall model. In this model, each phase must be completed before moving on to the next phase. To ensure that the transfer to the next step is achievable, each stage includes a current process control. Simple and straightforward to use. Every stage of the V-Shaped model has specific outcomes, making it simple to manage.

Good for small-sized projects, where requirements are fixed and clear. Highly rigid. Bigger Risks are involved. As the name suggests, the model divides the product into multiple stages and releases a functioning product in a short amount of time. This process produces a series of releases. Due to this, the consumer can view the end outcome and decide if he is happy with it or not.

Extreme programming is one of the examples of the Agile Model present in the industry. Customer satisfaction is achieved. The initial version will be released quickly. Risks can be eliminated due to flexible processes. Because it is dependent on customer satisfaction-if the customer is unclear, the team may lead to the incorrect route. The SDLC life cycle process is repeated, with each release adding more functionality until all requirements are met.

In this method, every cycle act as the maintenance phase for the previous software release. Modification to the incremental model allows development cycles to overlap. After that subsequent cycle may begin before the previous cycle is complete. In this type of SDLC model testing and the development, the phase is planned in parallel. So, there are verification phases of SDLC on the side and the validation phase on the other side.

V-Model joins by Coding phase. Agile methodology is a practice which promotes continue interaction of development and testing during the SDLC process of any project.

In the Agile method, the entire project is divided into small incremental builds. All of these builds are provided in iterations, and each iteration lasts from one to three weeks. The spiral model is a risk-driven process model. This SDLC testing model helps the team to adopt elements of one or more process models like a waterfall, incremental, waterfall, etc. This model adopts the best features of the prototyping model and the waterfall model.

The spiral methodology is a combination of rapid prototyping and concurrency in design and development activities. Big bang model is focusing on all types of resources in software development and coding, with no or very little planning. The requirements are understood and implemented when they come.

This model works best for small projects with smaller size development team which are working together. It is also useful for academic software development projects. It is an ideal model where requirements is either unknown or final release date is not given. Skip to content. What is SDLC? Why SDLC? Phase 2: Feasibility study Once the requirement analysis phase is completed the next sdlc step is to define and document software needs.

There are mainly five types of feasibilities checks: Economic: Can we complete the project within the budget or not? Operation feasibility: Can we create operations which is expected by the client?

Technical: Need to check whether the current computer system can support the software Schedule: Decide that the project can be completed within the given schedule or not. The developer fixes the issue, and software testers test the product and hand it over the back to the customer. JavaScript Tutorials jQuery Tutorials. Table of Contents. What is SDLC? Phases of the Software Development Life Cycle.

Third Phase: Designing Phase. Fourth Phase: Building or Coding Phase. Fifth Phase: Testing Phase. Sixth Phase: Deployment Phase. Seventh Phase: Maintenance Phase.