Software Process

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1. What are the fundamental activities that are common to all software processes?

a. Specification – defining what the system should do;

b. Design and implementation – defining the organization of the system and implementing the system;

c. Validation – checking that it does what the customer wants;

d. Evolution – changing the system in response to changing customer needs.

2.List the 3 generic process models that are used in software engineering?

← The waterfall model

▪ Plan-driven model. Separate and distinct phases of specification and development.

← Incremental development

▪ Specification, development and validation are interleaved. May be plan-driven or agile.

← Reuse-oriented software engineering

▪ The system is assembled from existing components. May be plan-driven or agile.

3. Why are iterations usually limited when the waterfall model is used?

← The main drawback of the waterfall model is the difficulty of accommodating change after the process is underway. In principle, a phase has to be complete before moving onto the next phase.

4.What are the three benefits of incremental development, compared to the waterfall model?

← The cost of accommodating changing customer requirements is reduced.

▪ The amount of analysis and documentation that has to be redone is much less than is required with the waterfall model.

← It is easier to get customer feedback on the development work that has been done.

▪ Customers can comment on demonstrations of the software and see how much has been implemented.

← More rapid delivery and deployment of useful software to the customer is possible.

▪ Customers are able to use and gain value from the software earlier than is possible with a waterfall...
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