Waterfall model: Waterfall model concerns with the sequential completion of the stages in software development life cycle. Software development life cycle includes requirement analysis, design, implementation and testing stages. Each stage is completed separately. The approach of waterfall model states that each stage in the software development life cycle must be completed before the beginning of the next stage. It requires the flow of activities in a sequential order and a stage is initiated only after successful completion of the previous stage. Incremental and iterative paradigm: Incremental and iterative paradigm is a combination of both incremental paradigm and iterative paradigm. Incremental approach uses a partial implementation of the whole system. It is a combination of one or several waterfall models. It includes the requirement analysis, design, implementation, and testing stages to be performed on the incremental basis until the successful completion of software. It adds some new functionality in each small increment. Iterative paradigm uses addition of new functionality in a repetitive manner. Incremental and iterative paradigm develops the software in small increments and in iterative or repetitive cycles.

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Chapter 7.3, Problem 1QE

Program Plan Intro

Waterfall model:

Waterfall model concerns with the sequential completion of the stages in software development life cycle. Software development life cycle includes requirement analysis, design, implementation and testing stages. Each stage is completed separately.

The approach of waterfall model states that each stage in the software development life cycle must be completed before the beginning of the next stage. It requires the flow of activities in a sequential order and a stage is initiated only after successful completion of the previous stage.

Incremental and iterative paradigm:

Incremental and iterative paradigm is a combination of both incremental paradigm and iterative paradigm.

Incremental approach uses a partial implementation of the whole system. It is a combination of one or several waterfall models. It includes the requirement analysis, design, implementation, and testing stages to be performed on the incremental basis until the successful completion of software. It adds some new functionality in each small increment. Iterative paradigm uses addition of new functionality in a repetitive manner.

Incremental and iterative paradigm develops the software in small increments and in iterative or repetitive cycles.

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When formal development processes were first established in the early 1970s, software engineers had a very simple visual model of these phases. They assumed that one phase would run to completion, its output would spill over to the next phase, and the next phase would begin. This model is called the waterfall model of software development. Could you please provide me with 5 disadvantages of using this model?

Step-by-step software development has benefits over waterfall models.

Determine three paradigms for software development that indicate a departure from the waterfall approach.