Question: 6. The direct time study was used in timing 5 cycles of an operator doing a manual assembly. The product assembly cycle is divided into

6. The direct time study was used in timing 5

6. The direct time study was used in timing 5 cycles of an operator doing a manual assembly. The product assembly cycle is divided into 8 elements. The operator is using power hand tools. The observer first measures time for Cycle 1 from Element 1 to Element 8 and then moves to Cycle 2 to measure time for Element 1 to Element 8, similarly the observer repeats this for Cycle 3, Cycle 4 and Cycle 5. Measured times are shown in the table below. Please note that: x in this table indicates fumble, y indicates sneeze and "z" indicates tool maintenance. Determine: (a) Average measured time for each of the 8 elements based on the 5 cycles timed in this study. (b) The average normal time for completing one cycle. (c) The standard time for this product cycle using a PFD allowance of 14%. (d) Number of components completed in an 8hr shift with two 14 minutes breaks based on the standard time calculated in part (c) above. Elements Cycle 1 Cycle 2 Cycle 3 Cycle 4 Cycle 5 Performance Rating 110 1 16 179 494 656 2 85 26 189 352 504 666 3 80 60 222 386 538 699 4 110 75 237 400 553 714 5 95 98 261 413 576 737 6 115 114 277 430 592 752 7 90 140 303 455 616 777 8 Z 800 105 163 325 478 639 Table 1.1: Results of Direct Time Study(DTS) for a product assembly. Each cycle is divided into 8 elements and the analyst observed a total of 5 cycles. 6. The direct time study was used in timing 5 cycles of an operator doing a manual assembly. The product assembly cycle is divided into 8 elements. The operator is using power hand tools. The observer first measures time for Cycle 1 from Element 1 to Element 8 and then moves to Cycle 2 to measure time for Element 1 to Element 8, similarly the observer repeats this for Cycle 3, Cycle 4 and Cycle 5. Measured times are shown in the table below. Please note that: x in this table indicates fumble, y indicates sneeze and "z" indicates tool maintenance. Determine: (a) Average measured time for each of the 8 elements based on the 5 cycles timed in this study. (b) The average normal time for completing one cycle. (c) The standard time for this product cycle using a PFD allowance of 14%. (d) Number of components completed in an 8hr shift with two 14 minutes breaks based on the standard time calculated in part (c) above. Elements Cycle 1 Cycle 2 Cycle 3 Cycle 4 Cycle 5 Performance Rating 110 1 16 179 494 656 2 85 26 189 352 504 666 3 80 60 222 386 538 699 4 110 75 237 400 553 714 5 95 98 261 413 576 737 6 115 114 277 430 592 752 7 90 140 303 455 616 777 8 Z 800 105 163 325 478 639 Table 1.1: Results of Direct Time Study(DTS) for a product assembly. Each cycle is divided into 8 elements and the analyst observed a total of 5 cycles

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