This blog allows discussions to be held on various machine safety topics including safety design, safety legislation, safety standards, risk assessment and much more. Receive expert commentary from safety specialists or share an opinion or perspective of your own!
As the name suggests, this metric is the average time until a component fails, based on reliability data or testing results.
If the component has a very long expected life compared to the MTTR, then the MTTF and MTBF will be very similar.
As availability approaches 1, the device is operational more. The smaller the MTTR, in relation to the life of the component, the closer the availability gets to an ideal value of 1.
What's the difference between MTTFd and MTTF?
So what about the value MTTFd? Is this the same as MTTF? The answer is no, MTTFd only considers dangerous failures of the component.
For example: If an E-Stop contact needs to open to initiate a safe stop, MTTFd will only consider the failures that cause the contact to remain closed. However MTTF would consider failures that cause the contact to remain open or closed.
Hopefully this clears up any confusion you have about theses reliability metrics.
Register for a Safety Standards Workshops led by a TUV trained Safety Specialists.
With over four decades of electrical and engineering industry excellence, and driven by a team of over 900 quality personnel, NHP Electrical Engineering Products Pty Ltd is a revered market leader where the aim is simple – to provide ‘what you want, when, where and how you want it’.
Awesome Inc. theme. Powered by Blogger.
