Re: two factories, different profile, how to compare?

peter.anderson.1969 wrote:
Thank you espyrian,

Therefore you mean this:

Say I have 10 machines in TW and 10 in CN. As of 2006, TW machines are
10 yrs old and CN machines are 1 yr old.

Combining these two population to form 1 populatiion consisting of 20
machines, 10 of which are 1 yr old and the remaining 10 are 10 yrs old.

Then I derve the expected failure rate for TW from this population and
compare with TW's actual failure rate, similarly for CN.

Then how do we judge which is better? Lets say X = Expected - Actual.
If X of TW is > X of CN, we can conclude TW machine performance is
better?


Rather than compare the failure rate of machines in your TW factory to machines in your CN factory, I would, if possible, compare the failure rate in the TW factory against the failure rate of ALL similar 10-year-old machines in Asia (as an example of a standard population). Similarly I would compare the failure rate of the machines in your CN factory against all similar 1-year-old machines in Asia.

So failure_rate_Asia * 10 = expected no. of failures in your factory. Compare that to actual no. of failures in your factory.

This is basically the idea behind indirect age standardisation.
.

Relevant Pages

  • Re: two factories, different profile, how to compare?
    ... Say I have 10 machines in TW and 10 in CN. ... compare with TW's actual failure rate, ... Rather than compare the failure rate of machines in your TW factory to ... a good first approximation into the comparison of 10-year SURVIVERS ...
    (sci.stat.math)
  • Re: Advice sought on which processor for a laptop
    ... laptop for the start of his course. ... and one fails then that's a 1% failure rate and changes your perspective. ... On machines that get as much use ... recommend HP myself, being a Toshiba fan, I have to say these aren't bad at ...
    (uk.comp.homebuilt)
  • Re: Is an U60 a U60 without a Elite 3Dm6 framebuffer ??
    ... > That's a 100% failure rate. ... disks fail in all types of machines with depressing regularity. ... - Enquire within ...
    (comp.sys.sun.hardware)
  • Re: two factories, different profile, how to compare?
    ... Say I have 10 machines in TW and 10 in CN. ... Then I derve the expected failure rate for TW from this population and ... compare with TW's actual failure rate, ... If X of TW is> X of CN, we can conclude TW machine performance is ...
    (sci.stat.math)
  • Re: Opinions on Grizzly lathe/mill combos
    ... Either one of those machines ... The White Eagle factory used to be about a 4 - 5 hour ... domestic Chinese market. ... find the accountants in China can be just as sharp ...
    (rec.crafts.metalworking)
Quantcast