Question

Sharpening your pencil is an operation that may be divided into eight small elemental motions. In...

Sharpening your pencil is an operation that may be divided into eight small elemental motions. In MTM? terms, each element may be assigned a certain number of? TMUs:

Reach 4 inches for the pencil

4

TMU

Grasp the pencil

2

TMU

Move the pencil 6 inches

10

TMU

Position the pencil

24

TMU

Insert the pencil into the sharpener

3

TMU

Sharpen the pencil

140

TMU

Disengage the pencil

8

TMU

Move the pencil 6 inches

12

TMU

a) The total normal time in minutes for sharpening the pencil? =____minutes ?(round your response to four decimal? places).

b)The total normal time in seconds for sharpening the pencil??

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Answer #1

One TMU or Time measurement unit is equal to 0.0006 minutes.

These smaller units of time measurement are used in motion time study for accurate measurement of time.

Total time (in TMU) for sharpening the pencil is equal to the sum of the time taken for completing each element, i.e.,

= 4 + 2 + 10 + 24 + 3 + 140 + 8 + 12

= 203 TMU

Ans a)

The total normal time in minutes for sharpening the pencil? = 203 * 0.0006 minutes

= 0.1218 minutes.

The total normal time in seconds for sharpening the pencil? = 0.1218 * 60 seconds

= 7.308 seconds.

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