B
I recently sat in on an Aladom Reliability Centered Maintenance presentation. It was interesting to see how control system/safety system reliability (or lack thereof) is being presented to maintenance personnel. More specific was the discussion on failure mode. Six different failure modes were discussed. The bath tub curve - high initial followed by random and then high failure rates as products age - is not the only failure type and in fact nor is it the most common. Electronic failures are generally considered to be high infant mortality and then random.
The point of this is to reduce unnecessary maintenance. Not only will this save money but it is during maintenance that we are often vulnerable to other safety, production issues. This fits with my observation that: It's when our fingers are in the cabinets that we have problems.
Given this information, I believe we need to work harder at having fewer maintenance releases and fewer upgrades. I certainly haven't seen this from the vendors. The trend in industry seems to be more.
The point of this is to reduce unnecessary maintenance. Not only will this save money but it is during maintenance that we are often vulnerable to other safety, production issues. This fits with my observation that: It's when our fingers are in the cabinets that we have problems.
Given this information, I believe we need to work harder at having fewer maintenance releases and fewer upgrades. I certainly haven't seen this from the vendors. The trend in industry seems to be more.