pcr june 08 answer to q 1.2 b

taskey

looking at the answers, why would i gross the production required by (0.5/99.5), just a tad confused.


Thanks

Tracy

CathG

The data at the beginning tells us that there's wastage:

'1 in every 200 units is rejected by quality control'

so that has to be built in production to get the number of 'good' units needed.

SandyHood

1/200 is as you rightly identified 0.5%

I would expect the current examiner to use much bigger wastage % rates

1. they are more realistic
2. they enable him to quickly see which candates are working out the wastage correctly a lot more easily (1/200 and 1/199 are very close together but 20/80 and 20/100 are easily identiable as different)

taskey

thanks Sandy

I am even more confused now, as at the beginning of the answer the wastage of 50 was removed, then put back on again. why would this happen.

Thanks

Tracy

SandyHood

Sadly, there are a lot of misleading model answers

I have an answer available if you email me with the following (exactly) as the subject:
Sandy's PCR Answer June 2008

mark130273

ive found that these questions you have to look at production isonly at 95% beacause off the wastage ... so if they need 950 good ones, then you need to produce 1000 ?

tok a while for that to set in !

taskey

i get that bit mark, it is just, you take off the wastage, work stuff out, then add it back on again.

AARRGGHH

Tracy