A task involves positioning two metal parts with a rubber gasket sandwiched between them, inserting two bolts into predrilled holes, threading a nut onto each bolt, and tightening each bolt with a pneumatic wrench
In a preliminary study, the manager observed one of his workers performing this task five times. The observations were made in an air-conditioned, well-lit training facility, at ground level, with all tools and equipment clean and readily available.
Observation: 1 2 3 4 5
Task time (seconds): 50 54 60 66 56
a. What is the average observed time for this task?
b. What is the normal time for this task if the employee worked at a 10% slower pace than is typical for adequately trained workers?
c. What is standard time for this task if allowances sum to 14%?
a. Actual observed time is 286/5 = 57.2 seconds.
b. Normal time is (57.2 )( 0.90 ) = 51.48 seconds.
c. Standard time is 51.48/(1 - .14 ) = 59.86 seconds.
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