In conditional based maintenance, what is meant by a base line study?

• A. Initial look at everything critical to compare with later
• B. Final assessment after maintenance
• C. Routine inspection schedule
• D. Cost-benefit evaluation

Answer: (A)

In conditional-based maintenance, a base line study means capturing the initial, healthy condition of the system by recording the essential parameters you’ll monitor later (like vibration, temperature, wear, etc.). This creates a reference point so that future measurements can be compared to what is normal, making it possible to spot deviations that indicate potential problems.

This baseline isn’t a final assessment after maintenance, and it isn’t a routine inspection schedule or a cost-benefit analysis. It’s the starting point that defines what normal looks like, so you can detect when things drift and decide if maintenance is needed.