Question: 3.12 The snapback method was used to time study a worker-machine cycle consisting of ele- ments a, b, and c. Elements a and b are

3.12 The snapback method was used to time study a

3.12 The snapback method was used to time study a worker-machine cycle consisting of ele- ments a, b, and c. Elements a and b are worker-controlled and were performance rated at 100% during the time study. Element c is machine-controlled. Elements b and c are per- formed simultaneously. The PFD allowance is 12% and the machine allowance is 10%. One work piece is produced each cycle. Determine (a) the normal time, (b) the standard time for the cycle. (c) the number of pieces completed if the worker works 7 hr and 10 min dur- ing an 8-hour shift, and his performance level is 135%. 8 os 7.90 Sy do Element a b Observed time (min) 1.25 0.90 0.80 -- palin

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