Software Process Models

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What is a software process model?

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It is the representation of the software process.

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What does a software process model represent?

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A simplified description of a software process that presents one view of that process.

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What may process models include?

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Activities that are part of the software process, software products, and the roles of people involved in software engineering.

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What are the three general models of software development?

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1. The Waterfall model 2. Incremental development/Evolutionary development model 3. Integration and configuration/Component based software engineering model

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Describe the Waterfall model.

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It represents activities as separate process phases such as requirements specification, software design, implementation, testing, etc. Once a stage is defined, it is 'signed-off' and development moves to the next stage.

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What is a key characteristic of the Waterfall model?

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Once a stage is completed, you cannot go back.

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Describe the Incremental development/Evolutionary development model.

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This approach interleaves the activities of specification, development, and validation. An initial system is rapidly developed from abstract specifications and refined with customer input.

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What happens in the Incremental development model after the initial system is developed?

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It may be delivered or further refined to produce a more robust and maintainable system.

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Describe the Integration and configuration/Component based software engineering model.

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This technique assumes that parts of the system already exist, focusing on integrating these parts rather than developing them from scratch.