Software Evolution and Maintenance Chapter 9
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Questions and Answers

What is one of the most obvious advantages of software reuse?

  • Reduced productivity
  • Improved maintainability
  • Economic benefit (correct)
  • Increased process risk

    • What is a result of increased productivity due to software reuse?

  • Accelerated development (correct)
  • Compliance with standards
  • Reduced process risk
  • Improved maintainability

    • What is a type of reuse model that involves designing and implementing reusable components?

  • Extractive
  • Domain Engineering
  • Reactive
  • Proactive (correct)

    • What is another term for 'development-for-reuse' process?

    <p>Product Line Development</p> Signup and view all the answers

    What is a risk associated with the proactive approach to reuse?

    <p>Investment risk</p> Signup and view all the answers

    What is a benefit of software reuse in terms of reliability?

    <p>Increased reliability</p> Signup and view all the answers

    What is a result of reduced process risk due to software reuse?

    <p>Increased productivity</p> Signup and view all the answers

    What is a characteristic of software reuse that involves creating reusable assets?

    <p>Development-for-reuse</p> Signup and view all the answers

    What is a necessary condition for software reuse to succeed?

    <p>Providing economic benefits</p> Signup and view all the answers

    What is the minimum number of times an artifact needs to be reused to recoup the extra cost of developing reusable components?

    <p>13 times</p> Signup and view all the answers

    What is the purpose of a reuse library?

    <p>To provide an interface to search the repository</p> Signup and view all the answers

    What is domain engineering also referred to as?

    <p>Product line development</p> Signup and view all the answers

    What is the goal of domain engineering?

    <p>To create reusable software assets</p> Signup and view all the answers

    What is a way to collect library assets?

    <p>All of the above</p> Signup and view all the answers

    What is a key factor in software reuse?

    <p>Economic</p> Signup and view all the answers

    What is a potential problem in software reuse?

    <p>Liabilities and responsibilities</p> Signup and view all the answers

    Which activity is NOT one of the main activities involved in software reuse?

    <p>Software maintenance</p> Signup and view all the answers

    Who is credited with introducing formal software reuse?

    <p>Dough McIlroy</p> Signup and view all the answers

    What is meant by 'domain analysis' in the context of software reuse?

    <p>Identifying objects and operations of similar software systems in a specific problem domain</p> Signup and view all the answers

    Which type of reusable artifact involves the reuse of executable code?

    <p>Program reuse</p> Signup and view all the answers

    What necessary component is highlighted for data reuse?

    <p>Standard data interchange format</p> Signup and view all the answers

    Which concept was introduced by David Parnas?

    <p>Program families</p> Signup and view all the answers

    What does design reuse primarily deal with?

    <p>Reusing abstract design tailored to meet application requirements</p> Signup and view all the answers

    Which types of reuse involve creating a set of generic design styles and functional elements?

    <p>Architectural reuse</p> Signup and view all the answers

    What is a key characteristic of reactive approaches in reuse models?

    <p>Reuse opportunities are identified during product development.</p> Signup and view all the answers

    Which of the following is a situation where a reactive approach to reuse would be effective?

    <p>There is an aggressive production schedule with limited resources.</p> Signup and view all the answers

    What is one potential downside of using reactive approaches in reuse models?

    <p>They can become more expensive due to continuous reengineering.</p> Signup and view all the answers

    Which approach reuses operational software products to establish an initial baseline for domain engineering?

    <p>Extractive approaches</p> Signup and view all the answers

    What prerequisite is necessary for an organization to effectively use an extractive approach in domain engineering?

    <p>Accumulated artifacts and experiences in a domain</p> Signup and view all the answers

    Which factor related to systematic software reuse is linked with cultural, social, and political factors?

    <p>Legal</p> Signup and view all the answers

    Which factor of systematic software reuse emphasizes the need for upper management support due to required investment and organizational changes?

    <p>Managerial</p> Signup and view all the answers

    Which of the following is NOT one of Frakes and Gandel's four major factors for systematic software reuse?

    <p>Operational</p> Signup and view all the answers

    Study Notes

    Benefits of Reuse

    • Software reuse provides several benefits, including economic benefits, increased reliability, reduced process risk, increased productivity, compliance with standards, accelerated development, improved maintainability, and less maintenance effort and time.

    Reuse Models

    • There are three types of reuse models: proactive, reactive, and extractive approaches.
    • Proactive approaches involve designing and implementing reusable components for all conceivable variations, including design of reusable assets.
    • Reactive approaches involve developing reusable assets when a reuse opportunity arises.
    • Extractive approaches fall in between proactive and reactive approaches, reusing some operational software products to make a domain engineering's initial baseline.

    General Idea of Reuse

    • Formal software reuse was first introduced by Doug McIlroy.
    • Early development of reuse includes the concept of program families introduced by David Parnas.
    • Domain analysis was introduced by Jim Neighbors, which means finding objects and operations of a set of similar software systems in a specific problem domain.
    • There are four types of reusable artifacts: data reuse, architectural reuse, design reuse, and program reuse.

    Factors Influencing Reuse

    • Four major factors that influence systematic software reuse are: managerial, legal, economic, and technical.
    • Managerial factors require upper management support, as it may need years of investment before it pays off.
    • Legal factors are linked with cultural, social, and political factors, and present difficult problems.
    • Economic factors require that software reuse provides economic benefits, and some artifacts need to be reused more than 13 times to recoup the extra cost.
    • Technical factors have received much attention from researchers, and involve library development, object-oriented development paradigm, and domain engineering.

    Domain Engineering

    • Domain engineering refers to a development-for-reuse process to create reusable software assets (RSA), also known as product line development.
    • It is the set of activities that are executed to create reusable software assets to be used in specific software projects.
    • Domain engineering involves identifying the requirements of a software product family, designing a reusable, generic software structure, and developing members of the family.

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    Description

    This quiz covers chapter 9 of Software Evolution and Maintenance, focusing on reuse and domain engineering, including topics like formal software reuse, domain engineering, and maturity models.

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