Following a feasibility study of the existing system, John finds out that although the system is technically good, it has some operational defects. Which maintenance can he perform to enhance overall efficiency and functionalities?

Question

BlackTom AI · Accepted Answer

Perfective maintenance improves functionality, performance, and usability of a system, so it directly addresses operational defects that reduce efficiency.

1) Relevant concepts and definitions
- Preventive maintenance: changes made to prevent future failures (e.g., scheduled updates, refactoring to avoid degradation).
- Adaptive maintenance: modifications to keep the system compatible with a changing environment (e.g., OS upgrades, regulatory changes).
- Corrective maintenance: fixes for discovered faults or bugs that cause incorrect behavior or crashes.
- Perfective maintenance: enhancements to improve performance, efficiency, usability, or add small features requested to make the system better even though it currently works.

2) Step-by-step reasoning
- John’s feasibility study shows the system is “technically good” (no fatal technical faults) but has “operational defects” that reduce efficiency and functionality.
- The phrase operational defects implies the system functions but could be improved in how it operates (through performance tuning, UI improvements, better algorithms, or added enhancements).
- Mapping the problem to maintenance types: it is not about preventing future failures (not preventive), not about adapting to external changes (not adaptive), and not primarily about correcting a malfunctioning bug that stops it working (not corrective).
- The goal stated is “to enhance overall efficiency and functionalities,” which matches the definition of perfective maintenance.

3) (No numerical calculations are required for this conceptual question.)

4) Why the correct answer is correct
Perfective maintenance explicitly targets improvements in efficiency and functionality of an already working system. It is the appropriate action when a system is technically sound but operationally suboptimal.

5) Why the other options are incorrect (brief)
- A. Preventive Maintenance: focuses on avoiding future breakdowns, not on enhancing current efficiency/features.
- B. Adaptive Maintenance: focuses on external environment changes (platform, laws), not internal operational improvements.
- C. Corrective Maintenance: fixes defects causing incorrect operation or failures, whereas John’s system works but needs enhancement.

Conclusion: Therefore, the correct choice is D. Perfective Maintenance, which matches the provided answer.

Following a feasibility study of the existing system, John finds out that although the system is technically good, it has some operational defects. Which maintenance can he perform to enhance overall efficiency and functionalities?单项选择题

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