Question

D) A pilot work study has been conducted on a new operation with four work elements. The following times, in seconds, were obtained using the continuous method. Observations Element 1 2 3 4 5 RF 1 11.00 45.00 80.00 117.00 153.00 1.10 2 20.00 54.00 89.00 125.00 161.00 1.05 3 25.00 58.00 95.00 131.00 166.00 0.85 a. What is the normal time for this operation? (3 marks) b. If an allowance of 20 percent is used, what is the standard time for this task? (3 marks) c. What sample size is appropriate for estimating the time for element 3 within ± 3 percent of the true mean time with 95 percent confidence (z = 1.96)? (3 marks)

          D) A pilot work study has been conducted on
a new operation with four work elements.
The following times, in seconds, were
obtained using the continuous method.
Observations
Element 1
2
3
4
5
RF
1
11.00
45.00
80.00
117.00
153.00 1.10
2
20.00
54.00 89.00
125.00 161.00 1.05
3
25.00 58.00 95.00
131.00 166.00 0.85
a. What is the normal time for this operation?
(3 marks)
b. If an allowance of 20 percent is used, what
is the standard time for this task? (3 marks)
c. What sample size is appropriate for
estimating the time for element 3 within ± 3
percent of the true mean time with 95 percent
confidence (z = 1.96)? (3 marks)

D) A pilot work study has been conducted on
a new operation with four work elements.
The following times, in seconds, were
obtained using the continuous method.
Observations
Element 1
2
3
4
5
RF
1
11.00
45.00
80.00
117.00
153.00 1.10
2
20.00
54.00 89.00
125.00 161.00 1.05
3
25.00 58.00 95.00
131.00 166.00 0.85
a. What is the normal time for this operation?
(3 marks)
b. If an allowance of 20 percent is used, what
is the standard time for this task? (3 marks)
c. What sample size is appropriate for
estimating the time for element 3 within ± 3
percent of the true mean time with 95 percent
confidence (z = 1.96)? (3 marks)

Added by Jessica B.

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