Answer:
The capability for lower specification is less than 1.25 and therefore the process is not capable of producing DRAM chips to specification
Step-by-step explanation:
Meena Chavan Corp.’s computer chip production process yields DRAM chips with an average life of 1,800 hours and s = 100 hours. The tolerance upper and lower specification limits are 2,400 hours and 1,600 hours, respectively. Is this process capable of producing DRAM chips to specification?
The capability index ratio is a statistical measurement. This analyzes whether a product is processed or produced within the supplied specifications. Managers can measure the process and determine if it is satisfactory or there changes that needs to be made.
a. We have the following parameters
Upper specification =2400
lower specification=1600
average life (mean)=1800 hr
standard deviation SD=100
capability of process
US-LS/(6*SD)
=2400-1600/(6*100)
800/600
1.33
minimum capability is
we have
600/300, 200/300
2, 0.67
The capability for lower specification is less than 1.25 and therefore the process is not capable of producing DRAM chips to specification