3.Software Development Life Cycle Models | Software Engineering

Software development life cycle models in Software engineering for UGC NET computer science, GATE , HTET * Build and Fix Model : This is very simple model of software development, the product is constructed with minimal requirements, and without any specifications and without any design. Testing is neglected. Drawbacks:- Unsatisfying approach for large software. Cost is higher . Product will not be delivered on time . Product of overall low quality. No documentation is produced. Maintenance can be extremely difficult without specification and design document. * Waterfall Model :This model is named “waterfall model” because its diagrammatic representation resembles waterfalls, it is also called classical Model.This model is easy to understand and reinforces the notion of “define before design” and “design before code”.The model expects complete & accurate requirements early in the process. Waterfall Model works in a linear and sequential manner. Drawbacks:- It is difficult to define all requirements at the beginning of a project We can make changes in this model A working version of the system is not seen until late in the project’s life It does not suitable for large projects. Real projects are rarely sequential.