5 Software Development Life Cycle (SDLC) Models and Their Usage Scenario
Each project is unique and different from one another with specific set of goals. It can be achieved by opting for the right software development life cycle model. Each model has its own set of pros and cons but when used efficiently, they are highly reliable and produce the best results.
In each one of the model listed below, you will find the various stages it goes through before achieving the final objective/ goal. Based on the type of model you choose, it is also mandatory to alter the testing process as it is crucial for high quality end product.
When the SDLC came into being, the Waterfall model was the first one to be introduced. The type is also commonly known as the linear sequential life cycle model because it is highly linear in design and it is mandatory to complete each phase completely before a new one can begin. It is ideal for small projects which has realistic expectations and a review is a carried out every time a phase is successfully completed.
The V model denotes Verification and Validation while the structure of the model is very similar to the Waterfall. A sequential path is followed, however, the life cycle of the project is in a V shape so as to segregate the software development process into two different categories. The first one is the pre-coding and the next is the post-coding, with the actual code forming the base for this model. It requires each phase to be completed before a new one is commenced. It’s phases include high level design, low level design, implementation and coding.
At first look, the Incremental model might look a bit difficult to understand but the concept is quite simple. The entire project is divided into multiple builds, which is also known as multi waterfall cycle. Each module is assigned a specific part of the code which begins with design and development, testing and ends with implementation. As it is split into multiple modules, the alpha version of the software will be ready instantly which will slowly move towards perfection when every module is complete.
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A software developed using the agile model relies on implemental, rapid cycles. When using this model, multiple versions of the software will be released with quick intervals which will be thoroughly verified for issues and fixed in the next module. The model uses a circular module system which is segregated into different segments.
In a software development life cycle, Spiral model is deployed for complex, large scale projects. The SDLC phases involved in this model are planning, risk analysis, engineering, evaluation and implementation. The model is used for projects which pose a high risk factor due to increased investment and is best suited for large projects where forgiving ratio is null. It has strong documentation process and is an expensive way to approach a software development life cycle. The model is recommended only for large corporations who are ready to invest to reduce risk factor to the lowest possible level.
I hope, these models will help you for your project. Please write your comments below for these software development life cycle models and your thoughts.