Elemental Times Element 1 3 4 5 6 7 8 9 10 1 0.36 0.31 0.42 0.35 0.38 0.30 0.41 0.42 0.35 0.35 1.05 2 0.81 0.95 0.76 0.85 1.01 1.02 0.95 0.90 0.87 0.88 0.90 3 0.56 0.38 0.42 0.45 0.51 0.48 0.50 0.52 0.39 0.46 1.00 4 0.19 0.12 0.16 0.21 0.15 0.16 0.18 0.19 0.19 0.15 1.05
Data Products, Inc., packages and distributes a variety of
personal computer-related products. A time study has
been conducted for a job packaging 3.5-inch personal
computer diskettes for shipment to customers. The job
requires a packager to place 20 diskettes in a rectangular
plastic bag, close the bag with a twist tie, and place the
filled bag into a bin, which is replaced by another worker
when it is filled. The job can be broken into four basic
elements. The elemental times (in minutes) were ob-
tained from the time study for 10 job cycles shown in the
following table.
a. Using an allowance factor of 16%, determine the stan-
dard time for this job.
b. Determine the number of cycles for this time study
such that the company would be 95% confident that the
average time from the time study is within 4% of the
true average cycle time.
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