Automatic diagnostics that detect potentially dangerous failures in automation equipment is not only well accepted but required in electronic devices. The same concept should apply to remote actuated valve assemblies as well. But some reject the concept of Partial Valve Stroke Testing (PVST) primarily because they perceive a false trip risk. Why is this? PVST can significantly improve safety and reduce operational expense. But operational cost is not reduced with an increased false trip rate. Does this happen with PVST? Some designs may increase the false trip rate but others will significantly reduce it. Why is that? What are the variables? This webinar describes the history of PVST and several different PVST designs. Safety and false trip rate analysis is done for each and compared. Which design is best?