An initial analysis of a laboratory activity resulted in the first table below
After this analysis, the managers determined that their element descriptions were not as accurate as they should have been–they had left out an element, underestimated a distance, and understated the need for accuracy. They revised the table of element data, which appears in the second table.
Original Activity: Pouring tube specimen
Element description Element code TMU
Get tube from rack AA2 35
Get stopper, place on counter AA2 35
Get centrifuge, place at sample tube AD2 45
Pour (3 sec.) PT 83
Place tubes in rack (simo) PC2 40
TOTAL TMU
Revised Activity: Pouring tube specimen
Element description Element code TMU
Get tube from rack AC3 70
Get stopper, place on counter AA2 35
Get centrifuge, place at sample tube AD2 45
Pour (3 sec.) PT 83
Get stopper, place on tube AC1 40
Place tubes in rack (simo) PC2 40
TOTAL TMU
Calculate the total standard minutes for the original activity "pouring tube specimen." Calculate the total standard minutes for the revised activity "pouring tube specimen." What is the increase, in seconds, from the first version to the second? (Round calculations to four decimal places.)
The elements of the original description add to 238 TMU. The total standard minutes for the original description is thus 238 × .0006 = 0.1428 minutes. After the elements were revised, the activity totals 313 TMU. Total standard minutes rises to 313 × .0006 = 0.1878 minutes. The increase is 0.0450 minutes or 2.7000 seconds.
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