Category I vibration analysts are capable of performing simple machinery vibration measurements involving single-channel condition monitoring and diagnosis. A Category II Vibration Analyst is expected to have a basic knowledge of machine vibration, be capable of routine data collection and periodic monitoring, and be able to perform basic fault diagnosis and condition evaluation. III must be capable of carrying out fault diagnosis, condition evaluation, and acceptance testing, and be able to set up periodic monitoring programs and perform minor corrective actions. To be certified as a Category IV Vibration Analyst, an individual must be certified as a Category III Vibration Analyst and have basic knowledge in signal processing, rotor dynamics, vibration control, and dual channel analysis.