SDLC abbreviation software development life cycle. All the programs have a software development life cycle model. It does not matter how small the program is? 0r how large the program is? 0r how many people working on project ? All programs face the same steps of software development life cycle models in software engineering. The sdlc phases are given below:
Steps of Process life cycle models are:
Conception / Beginning
Requirements gathering / Modelling / Exploration
Implementation / Coding and debugging
Delivery / Release
Software evaluation / Maintenance
Program may squeeze some of these steps, or merge two or more steps into a single piece of work. But, all programs face all these steps of process life cycle models.
However, every life cycle model is a difference on two fundamental types. In 1st type project team will mostly do complete life cycle. In 2nd type project team will mostly do a partial life cycle. This 2nd type is more prevalent these days.
These days the management of software development projects mostly descend into two different types. Following are the types of sdlc models in software engineering.
- Plan – driven models
- Agile development models
Plan – driven models:
In plan – driven models, the process tends to be harsh in phases of process steps and when deliveries happen. These models have more requirement for sign – of on completion of a step and more clearly defined phases before moving on the next step. It involve verification of completion of each work product and more documentation of each phase.
Agile development models:
Newer Agile models are essentially incremental models and make assumption that frequent, small deliveries produce a more robust product than less, larger frequent.
In agile models phases tend to un-focus together more than in plan driven models. Agile models have less documentation of work products required. See Agile Manifesto to get a good feel for the agile development goals and model.
We will take a look at different process software development life cycle models both agile and plan – driven models and comparison of them. There is not one best process for software development.
Each project must decide on the model that works best for its particular application and base that, the experience of the team, decision on the project domain, the timeline of the project and the size of the project.