In which life cycle model a working version of program will not be available?
In Waterfall model life cycle model a working version of program will not be available.
The waterfall model is a sequential design process in which progress is seen as flowing steadily downwards (like a waterfall) through the phases of Conception, Initiation, Analysis, Design, Construction, Testing, Production/Implementation and Maintenance.
Disadvantages of waterfall model: Once an application is in the testing stage, it is very difficult to go back and change something that was not well-thought out in the concept stage. No working software is produced until late during the life cycle. High amounts of risk and uncertainty.
The waterfall model is a project management methodology based on a sequential design process. Much like a waterfall filling lower level pools, phases in the waterfall model flow from one to another. ... A simple waterfall model has 6 phases: requirements, design, implementation, verification, deployment, and maintenance.
The Waterfall Model was the first Process Model to be introduced. It is also referred to as a linear-sequential life cycle model. ... The Waterfall model is the earliest SDLC approach that was used for software development. The waterfall Model illustrates the software development process in a linear sequential flow.