It's a little more subtle than that: the MTBF of a 20 year old (person) is about a thousand years. In other words if you looked at a population of say 10,000 over a period of a year, then you'd expect 10 of them not to make it.
(The statistics are not accurate I'm trying to describe the principal.)
__________________
If you spend all your time looking for people and things to complain about: trust me, you will find plenty to complain about.
A point well made. It shows how important it is to define the statistics that we see splashed about so carelessly on our media.
For engineers, another common term which is used by the military etc. is serviceability. This has nothing to do with "ease of...." but actually is an indicator of whether the product will be capable of reasonable use on a particular occasion.
That is how many days in its design life will the product - vehicle say - be available for service - use.
The aircraft industry need very good control of this because the ability to fly a plane is not the same as a plane which has no service issues / maintenance outstanding. If one seat will not adjust, it needs attention, if one engine will not run, it grounds the plane.
__________________
Hugh Mattos Chartered Engineer...... :---------: Through helping others we give purpose to our time on this earth and take pleasure from it.
Reliability
Re: Reliability
