Software Evolution

Software vs Hardware — Cost of Change

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Why is the flexibility of software one of the main reasons it is increasingly incorporated into large, complex systems?

Because changes can be made to software at any time during or after system development, whereas hardware changes are very expensive once manufacturing decisions are made

Because software never needs to be tested after changes are made

Because software is always cheaper to produce than hardware from the start

Because software changes are guaranteed to have no impact on other system components

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Maintenance Costs vs Development Costs

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How do the costs of software maintenance typically compare to the initial development costs?

Maintenance costs are always lower than initial development costs

Maintenance costs are often several times the initial development costs

Maintenance costs are zero if the system was well designed initially

Maintenance costs are roughly equal to development costs

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Development and Maintenance — Modern View

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The diagram below shows how the relationship between software development and software evolution is understood today.

Which statement best reflects this modern view?

The distinction between development and maintenance is becoming more important as systems grow larger

Development and maintenance should always be managed as completely separate projects with different teams

The distinction is increasingly irrelevant — it is more realistic to think of software engineering as an evolutionary process where software is continually changed over its lifetime

Only safety-critical systems blur the boundary between development and maintenance

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Classify — Hardware vs Software

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Statements

×Very expensive to change once manufacturing decisions are made

×Can be changed at any time during or after system development

×Even extensive changes are much cheaper than corresponding changes to the other type

Hardware

Software

Classify each of the following statements under the correct system type.

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Software Engineering as an Evolutionary Process

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Complete the sentence.

Rather than treating development and maintenance as two separate processes, it is more realistic to think of software engineering as an (1) process where software is continually (2) over its lifetime in response to changing requirements and customer needs.

Please drag and drop the selected option in the right place or type it instead

evolutionary

changed

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Software vs Hardware — Cost of Change

Correct Answer

Explanation

Maintenance Costs vs Development Costs

Correct Answer

Explanation

Development and Maintenance — Modern View

Correct Answer

Explanation

Classify — Hardware vs Software

Correct Answer

Explanation

Software Engineering as an Evolutionary Process

Correct Answer

Explanation

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