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Question 10.EX.4: USING PREDETERMINED TIME (MTM ANALYSIS) TO DETERMINE STANDAR...

USING PREDETERMINED TIME (MTM ANALYSIS) TO DETERMINE STANDARD TIME. General Hospital wants to set the standard time for lab technicians to pour a tube specimen using MTM.^4
APPROACH \blacktriangleright This is a repetitive task for which the MTM data in Table 10.3 may be used to develop standard times. The sample tube is in a rack and the centrifuge tubes in a nearby box. A technician removes the sample tube from the rack, uncaps it, gets the centrifuge tube, pours, and places both tubes in the rack.

TABLE 10.3 MTM-HC Analysis: Pouring Tube Specimen
ELEMENT DESCRIPTION ELEMENT TIME
Get tube from rack AA2 35
Uncap, place on counter AA2 35
Get centrifuge tube, place at sample tube AD2 45
Pour (3 sec) PT 83
Place tubes in rack (simo) PC2 40
Total TMU 238
.0006 × 238 = Total standard minutes = .143 or about 8.6 seconds
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SOLUTION \blacktriangleright The first work element involves getting the tube from the rack. The conditions for GETTING the tube and PLACING it in front of the technician are:
◆ Weight: (less than 2 pounds)
◆ Conditions of GET: (easy)
◆ Place accuracy: (approximate)
◆ Distance range: (8 to 20 inches)
Then the MTM element for this activity is AA2 (as seen in Figure 10.9). The rest of Table 10.3 is developed from similar MTM tables.

INSIGHT \blacktriangleright Most MTM calculations are computerized, so the user need only key in the appropriate MTM codes, such as AA2 in this example.

LEARNING EXERCISE \blacktriangleright General Hospital decides that the first step in this process really involves a distance range of 4 inches (getting the tube from the rack). The other work elements are unchanged. What is the new standard time? [Answer: .134 minutes, or just over 8 seconds]

RELATED PROBLEM \blacktriangleright 10.36

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