IE271_Lecture14

# The values are given in the table below elements a b

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task. The values are given in the table below. Elements a, b, and c are worker‑controlled. Element d is a machine‑controlled element and its time is the same each cycle (N.A. means performance rating is not applicable). Element c is performed while the machine is performing its cycle (element d). Element e is a worker‑controlled irregular element performed every six cycles. The machine is idle during elements a, b, and e. Four product units are produced each cycle. The machine allowance is zero, and a 15% PFD allowance is applied to the manual portion of the cycle. Determine (a) the normal time and (b) the standard time for this cycle. If the worker’s performance during actual production is 140% on all manual elements for seven actual hours worked on an eight-hour shift, (c) how many units will be produced and (d) what is the worker’s efficiency? Work element a b c d e Observed time (min) 0.65 0.50 0.50 0.55 1.14 Performance rating 90% 100% 120% N.A. 80%

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• Spring '10
• smith

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