Maintenance Prediction

Predicting future change volume, the complexity-maintainability link, and process metrics (impact analysis time, outstanding requests) used to spot declining maintainability

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QUESTION OF

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Views #: 190

Questions #: 9

Time: 10 minutes

Pass Score: 80.0%

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Goal of Maintenance Prediction

1 pts

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What is maintenance prediction primarily concerned with?

Determining which programming language a system should have been written in originally

Assessing the changes that may be required in a system and identifying parts most likely to be expensive to change

Predicting the exact date a system will be retired down to the calendar day

Forecasting stock market trends related to the software industry

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Three Types of Maintenance Predictions

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Prediction

Predicting maintainability

Predicting maintenance costs

Predicting system changes

Question Answered

What parts of the system will be the most expensive to maintain?

What will be the lifetime maintenance costs of this system?

How many change requests can be expected, and what parts of the system are most likely to be affected?

Match each maintenance prediction category to the question it primarily answers.

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Factors Affecting Number of Change Requests

1 pts

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Which of the following are factors that help evaluate the relationship between a system and its environment, used to predict the number of change requests? Select all that apply.

The business processes in which the system is used

The exact font used in the system's user interface

The number and complexity of system interfaces

The number of times the system has been backed up

The number of inherently volatile system requirements, especially those reflecting organizational policy

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Volatile Requirements and Organizational Policy

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Why are requirements that reflect organizational policies and procedures likely to be more volatile than requirements based on stable domain characteristics?

Organizational policies and procedures change more frequently than fundamental domain facts, leading to more change requests over time

Organizational policy requirements are always written in a less precise language

Volatile requirements are always related to user interface color schemes only

Domain-based requirements are illegal to modify once approved

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Complexity and Maintainability Relationship

1 pts

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What did early research on the relationship between program complexity and maintainability find?

The more complex a system or component, the more expensive it is to maintain

Complexity has no measurable relationship to maintenance cost at all

Simpler systems are always more expensive to maintain than complex ones

Complexity only affects maintenance cost in embedded systems, never in business systems

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Process Metrics for Assessing Maintainability

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Which of the following are process metrics described as useful for assessing maintainability after a system has been put into service? Select all that apply.

Average time required for impact analysis

Number of outstanding change requests

Number of requests for corrective maintenance

The number of cups of coffee consumed by the maintenance team

Average time taken to implement a change request

The total number of physical servers in the data center

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Rising Corrective Maintenance Requests

1 pts

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What might an increase in the number of bug and failure reports over time indicate about a system?

It has no relationship to maintainability and is purely a coincidence

It may indicate that more errors are being introduced into the program than are being repaired, suggesting declining maintainability

It always indicates the system has too many active users

It indicates that the hardware running the system needs more electricity

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Impact Analysis Time vs. Implementation Time

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True or False: The average time required for impact analysis and the average time taken to implement a change request measure exactly the same thing and are interchangeable metrics.

True

False

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COCOMO 2 Maintenance Effort Basis

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According to the COCOMO 2 cost estimation model, what two factors form the basis of an estimate for software maintenance effort?

The effort to understand the existing code and the effort to develop the new code

The number of programmers originally hired and the size of the original office

The market value of the company and the average national software salary

The total original development budget and the number of years since release

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Undergraduate Professional

Goal of Maintenance Prediction

Correct Answer

Explanation

Three Types of Maintenance Predictions

Prediction

Question Answered

Correct Answer

Explanation

Factors Affecting Number of Change Requests

Correct Answer

Explanation

Volatile Requirements and Organizational Policy

Correct Answer

Explanation

Complexity and Maintainability Relationship

Correct Answer

Explanation

Process Metrics for Assessing Maintainability

Correct Answer

Explanation

Rising Corrective Maintenance Requests

Correct Answer

Explanation

Impact Analysis Time vs. Implementation Time

Correct Answer

Explanation

COCOMO 2 Maintenance Effort Basis

Correct Answer

Explanation

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