During the maintenance phase, the team discusses various types of maintenance activities to ensure the system remains reliable and efficient.Which of the following activities are NOT typically done under preventive maintenance?i. Analyzing areas prone to issues and taking steps to avoid future problemsii. Enhancing the system’s functionality based on user feedbackiii. Correcting errors that appear after deploymentiv. Improving the speed of system operations

Question

BlackTom AI · Accepted Answer

Preventive maintenance aims to anticipate potential failures and take actions to avoid them (planned inspections, updates, and safeguards), not to add features, fix discovered defects, or primarily optimize performance.

1. Relevant knowledge points and concepts
- Types of software maintenance: corrective (fixing faults found after delivery), adaptive (modifying software to work in a changed environment), perfective (improving performance or adding/enhancing functionality), and preventive (making changes to prevent future faults or improve maintainability/reliability).
- Examples: preventive = code refactoring to reduce defects, scheduled inspections; corrective = bug fixes; perfective = new features or performance tuning.

2. Step-by-step mapping of each statement to maintenance types
- i. "Analyzing areas prone to issues and taking steps to avoid future problems" — this is preventive maintenance by definition.
- ii. "Enhancing the system’s functionality based on user feedback" — that is perfective maintenance (adding/enhancing features).
- iii. "Correcting errors that appear after deployment" — that is corrective maintenance (bug fixes).
- iv. "Improving the speed of system operations" — that is perfective maintenance (performance improvement), occasionally adaptive if required for new platforms, but not preventive.

3. Calculations
- No numeric calculations are required for this conceptual classification.

4. Why the correct answer is correct
- The question asks which activities are NOT typically done under preventive maintenance. Items ii, iii, and iv map to perfective/corrective activities, not preventive. Only i belongs to preventive maintenance, so the correct set of non-preventive items is ii, iii, and iv.

5. Why other options are incorrect
- A (i, iv): includes i which is preventive, so it cannot be a list of activities NOT done under preventive maintenance.
- B (ii, iii): misses iv, which is also not preventive, so it’s incomplete.
- D (i, iii, iv): includes i (which is preventive), so it’s incorrect.

6. Conclusion
- Therefore the correct choice is C: ii, iii, iv, which matches the provided answer.

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