Problem: Vibration analysis is a process of monitoring for anomalies in the vibration patterns exhibited by a system based on its variations in amplitude, intensity, frequency and analyzing the deviations from its established "norm" vibration signatures. One application is in helicopter engine health monitoring. By distinguishing between a condition monitoring and an on-condition maintenance task (as defined in MSG-2 methodology), analyse which category does vibration analysis belong to. Substantiate your answer with logical rationales.