Q. What is the total percentage of maintenance cost spent on changes to accommodate changing user requirements?

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Q. What is the primary cause of changes in user requirements?

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Q. Approximately what percentage of the total maintenance effort is spent on adapting software to environmental changes?

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Q. What type of maintenance is concerned with increasing the system’s future maintainability?

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Q. What type of maintenance is concerned with adapting the software to new or changed user requirements?

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Q. What type of maintenance is concerned with adapting the software to changes in the environment?

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Q. What type of maintenance is concerned with the repair of hidden defects?

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Q. What is an example of a preventive maintenance activity?

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Q. How much of the total cost of a software system over its lifetime is spent on maintenance?

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Q. What is the purpose of adaptive maintenance?

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Q. What type of maintenance is the repair of hidden defects?

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Q. What is the rule of thumb for successful projects according to Boehm (1987b)?

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Q. What is the rule of thumb for the relative effort spent on various activities in software development up to delivery of the system?

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Q. What is the typical percentage of effort spent on programming in software development?

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Q. Usually, what percentage of the total cost of a software system over its lifetime is consumed by maintenance?

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Q. What does the 40-20-40 rule suggest about the cost of errors made during requirements engineering?

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Q. Which rule of thumb estimates the percentage of effort spent on coding a system?

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Q. What is the main goal of software project management?

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Q. What is the main goal of testing during software development?

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Q. What is the main goal of documentation in software development?

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