Which metric measures the ease with which a system can be maintained?

Which metric measures the ease with which a system can be maintained?

• A. Maintainability
• B. Availability
• C. Reliability
• D. Scalability

Answer: (A)

Maintaining a system efficiently hinges on its maintainability—the ease with which maintenance tasks can be performed. When a system is highly maintainable, diagnosing faults, applying fixes, updating components, and patching systems can be done quickly and with less effort. This often stems from good modular design, clear documentation, standardized interfaces, and effective diagnostics, all of which reduce downtime and speed up future changes. In practice, metrics like how fast repairs or updates can be completed reflect this attribute, illustrating why maintainability is the best fit for “ease of maintenance.” Availability measures how often the system is up and serving requests, not how easy it is to maintain. Reliability concerns the likelihood the system performs without failures over time. Scalability deals with how well the system handles increasing load or growth.

Maintaining a system efficiently hinges on its maintainability—the ease with which maintenance tasks can be performed. When a system is highly maintainable, diagnosing faults, applying fixes, updating components, and patching systems can be done quickly and with less effort. This often stems from good modular design, clear documentation, standardized interfaces, and effective diagnostics, all of which reduce downtime and speed up future changes. In practice, metrics like how fast repairs or updates can be completed reflect this attribute, illustrating why maintainability is the best fit for “ease of maintenance.”

Availability measures how often the system is up and serving requests, not how easy it is to maintain. Reliability concerns the likelihood the system performs without failures over time. Scalability deals with how well the system handles increasing load or growth.