Your Reliability Engineering Professional Development Site
A listing in reverse chronological order of articles by:
What is a template? Merriam-Webster has two definitions that seem to apply to RCA work. They are: 1) a gauge, pattern, or mold (such as a thin plate or board) used as a guide to the form of a piece being made; 2) something that establishes or serves as a pattern. For our discussion let’s use the second. [Read more…]
Here is a diagram I generated when I was in the reliability group at my facility.
It came about because I was trying to identify why we may not be showing the value that was expected from the reliability improvement work we were doing. [Read more…]
The goal of a reliability initiative is to save money, not to “install” a system.
If that is not your current goal, then how did it get changed? Change sometimes happens slowly, so slowly that we don’t notice it.
I’m reminded of a fable about a camel and a Bedouin. It is cold outside and the [Read more…]
Reliability initiatives are implemented to improve a company’s bottom line, period.
Root cause analysis is one of the fastest ways I know to achieve this improvement. My boss used to say “show me the money” because he realized that upper management was driven by ROI (Return on Investment) or ROC (Return on Capital).
You can argue all you want on whether that is good or bad, but it is the way things are. [Read more…]
Recently there was a power outage, that caused approximately 2,000 homes to lose power during a very cold day. The paper headline read, “All-day outage caused by worn wiring”.
This seems like a reasonable comment and probably like many other newspaper headlines also seems to go a long way to explain what caused the 2,000 homes and business to lose power for 5 ½ hours, and the 300 that lost power for a total of 11 ½ hours. [Read more…]
Occasionally, I like to step back and reflect on reliability in basic terms.
In that spirit, the basic premise of reliability is usually stated as “The probability that an item will perform a required function, without failure, under stated conditions, for a stated period of time.”
To use the reliability equation, the definition of failure must be defined, so you can tell if your equipment has indeed failed. This way you can include it in the MTBF (Mean Time Between Failure) calculation.
After you have defined a failure and recorded them appropriately, you can plug the numbers into the reliability equation, R = e ^-(λ*t) where λ is the failure rate which is defined as λ= 1/MTBF and come up with an objective value for the reliability. [Read more…]