Question: Length, L (cm) Observed Time, Tobs (min) 3.11 Performance Rating (%) 51 115 91 6.25 94 75 5.06 98 81 5.83 91 46 2.76 119

Length, L (cm) Observed Time, Tobs (min) 3.11 Performance Rating (%) 51 115 91 6.25 94 75 5.06 98 81 5.83 91 46 2.76 119 30 2.08 114 81 6.63 80 84 6.08 90 75 4.59 108 80 64 5.41 The sawing department in a woodworking plant is attempting to develop a formula to compute the standard time for one of its operations. The operation involves cutting irregular contours out of 2.5 cm plywood using a band saw. Data have been collected from previous time studies indicating the observed time and performance rating for a variety of sawing contours. The observed times include plece loading time just before cutting begins The sawing time is correlated with the length of the saw cut, and length data have been collected from the original engineering drawings for these Jobs. All of these data are presented in the table above Given that the PF&D allowance factor is 15% Compute the standard time for a job in which the cut length is 123 cm. 0 11:32 min 8.81 min 9.65 min 10.07 min

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