08 Jun Question Chapter 9 6 It has been decided to study the a
Question
Chapter 9
6 It has been decided to study the activities of a market research company using work sampling. First, however, it has been concluded that any office can be used as a pilot operation where the methods can be developed and tested. Using Table 9-3 as a guide, choose any office and drop in 5 to 10 times, noting each time what every person who works in that office is doing. Then, develop the kind of information that is shown in Table 9-3. Even though the sample is small, analyze this data. How big a sample will be needed?
Left Hand Right Hand
Element 1 Get olives. Put on scale. Measure 1 lb+. Get jar.
Element 2 Put olives in jar. Clamp jar. Get brine.
Element 3 Get screw cap. Add brine.
Element 4 Screw on cap. Unclamp jar.
Element 5 Move toward olives. Put jar on conveyor.
7 For the market research company study described in Problem 6, what categories of activities might apply? How often should observations be made? Would you recommend using random sampling or taking observations at set times that are known to the employees of this company?
8 “A Spanish company packs green olives that have been soaked in brine into 1-pound jars. The olives are first divided into 1-pound-plus batches using a digital scale. On average, there are 32 olives to the pound.
The olives are inserted in a jar and brine is added. Then the jar is sealed with a twist cap and put on a conveyor. The left-hand, right-hand chart is shown here:”
Left Hand Right Hand
Element 1 Get olives. Put on scale. Measure 1 lb+. Get jar.
Element 2 Put olives in jar. Clamp jar. Get brine.
Element 3 Get screw cap. Add brine.
Element 4 Screw on cap. Unclamp jar.
Element 5 Move toward olives. Put jar on conveyor.
a. Sketch the process flow and layout.
b. The time estimates are given in Table 9-5.
c. Develop a sequence of work elements.
d. Prepare a job observation or time sheet.
Table 9-5 Olive Packing Times (in Hundredths of a Minute)
Element 1 2 3 4 5
Cycle 1 15 8 7 10 10
2 13 8 8 11 10
3 15 7 8 12 10
4 17 9 9 11 11
5 12 9 6 10 10
6 14 7 7 10 9
7 14 8 6 9 9
8 13 8 6 9 10
9 15 7 8 9 11
10 16 9 7 10 9
Total time 144 80 72 101 99
Number of observations 10 10 10 10 10
Expected cycles 1 1 1 1 1
Average time 14.4 8 7.2 10.1 9.9
Allowance 1 1 1 1 1
Normal time 14.4 8 7.2 10.1 9.9
R&D correction 1 1 1 1 1
Standard time 14.4 8 7.2 10.1 9.9
Total Cycle Time 49.6
9 Use the information in Problem 8 to determine the standard time for the job.
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