The Certification Vibration Analyst Certification program offers four categories of certifications. Category IV is the most advanced level of certification. An individual certified as a Category IV Vibration Analyst understands the theory of mechanical vibrations, advanced vibration analysis techniques, and signal analysis. They shall be qualified to direct condition monitoring programs, perform major diagnostic efforts, and perform and recommend corrective actions and design modifications. Candidates for Category IV Vibration Analyst must have a minimum of 60 months of experience in the vibration field and at least of 130 hours of training. Candidates for Category IV are expected to be able to manipulate simple algebraic equations, use a basic scientific calculator, and be computer literate. Completion of two or more years of study in mechanical technology or mechanical engineering is also recommended at this level.