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1. Problem 7-1
An analyst has timed a metal-cutting operation for 50 cycles. The average time per cycle was
10.7 minutes, and the standard deviation was 1.20 minutes for a worker with a performance
rating of 138 percent. Assume an allowance of 19 percent of job time. Find the standard time
for this operation. (Do not round intermediate calculations. Round your final answer to 2
decimal places.)
2. Problem 7-4
Given these observed times (in minutes) for four elements of a job, determine the observed time
(OT) for each element. Note: The second element only occurs every other cycle. (Round your
answers to 2 decimal places.)
CYCLE
Element
1
2
3
4
5
6
1
4.1
4.0
5.0
4.1
4.1
4.1