Gentlemen.

There seem to a a tendency by reliablity and maintenance practitioners to overstate the actual availablity of plant we run.

When we try to reconsile the plant availability with actual throughput there is a big discrepancy that can not be explained by merely accusing production or operations of inefficiency.

How can we calculate plant availability in such a way that we can relate the throughput achieved by de-rating plant availabilty by some reasonable co-efficient [typically in the 90 percentile] to come up with actual production throughput.

Ecky

Hi Ecky,
I think it depends on the management - some report acurately. The only way to get the right figures are to reconcile with production output where this is possible. In manufactureing for example, you need to get the rate and the time and the amount produced. if the rate and the time dont multiply to the amount produced, then you can work out the losses.
I think that ego's and KPI's often drive people to misrepresent the facts.
Rgds
Steve

Ecky,

Do you mean the plant does not produce as per the nameplate capacity and thus you to de-rate the plant capacity?