A worker was observed for four cycles in a repetitive task. The observer recorded the following times, in seconds, using the continuous method. The ratings for each element and frequency it is performed are also indicated in the table. The allowance fraction is 20 percent.
$$\begin{array} { | c | c | c | c | c | c | c | }
\hline \text { Element } & \text { Cycle 1 } & \text { Cycle 2 } & \text { Cycle 3 } & \text { Cycle 4 } & \text { Rating } & \text { Frequency } \
\hline \mathbf { 1 } & 15 & 106 & 208 & 309 & 1.10 & 1.0 \
\hline \mathbf { 2 } & 37 & 131 & 234 & 334 & 1.05 & 0.5 \
\hline \mathbf { 3 } & 47 & 143 & 245 & 348 & 1.20 & 0.5 \
\hline \mathbf { 4 } & 90 & 190 & 293 & 392 & 1.15 & 1.0 \
\hline
\end{array}$$
-Use the information in Table H.3.What is the select time for work element 2?
A) Fewer than 17 seconds
B) Greater than or equal to 17 seconds but fewer than 22 seconds
C) Greater than or equal to 22 seconds but fewer than or equal to 27 seconds
D) Greater than or equal to 27 seconds

Question

A worker was observed for four cycles in a repetitive task. The observer recorded the following times, in seconds, using the continuous method. The ratings for each element and frequency it is performed are also indicated in the table. The allowance fraction is 20 percent.
 $$\begin{array} { | c | c | c | c | c | c | c | } 
\hline \text { Element } & \text { Cycle 1 } & \text { Cycle 2 } & \text { Cycle 3 } & \text { Cycle 4 } & \text { Rating } & \text { Frequency } \
\hline \mathbf { 1 } & 15 & 106 & 208 & 309 & 1.10 & 1.0 \
\hline \mathbf { 2 } & 37 & 131 & 234 & 334 & 1.05 & 0.5 \
\hline \mathbf { 3 } & 47 & 143 & 245 & 348 & 1.20 & 0.5 \
\hline \mathbf { 4 } & 90 & 190 & 293 & 392 & 1.15 & 1.0 \
\hline
\end{array}$$
-Use the information in Table H.3.What is the select time for work element 2?
A) Fewer than 17 seconds
B) Greater than or equal to 17 seconds but fewer than 22 seconds
C) Greater than or equal to 22 seconds but fewer than or equal to 27 seconds
D) Greater than or equal to 27 seconds

Quizplus · Accepted Answer

To calculate the select time for work element 2, we need to use the formula: 
Select time = Observed time x Rating factor x Frequency factor x Allowance factor 
For work element 2: 
Observed time = (37+131+234+334)/4 = 184 seconds 
Rating factor = 1.05 
Frequency factor = 0.5 
Allowance factor = 1.2 
Select time = 184 x 1.05 x 0.5 x 1.2 = 116.28 seconds 
Rounding up to the nearest second, we get the select time for work element 2 as 116 seconds. 
Using the given range of select times, we see that the answer is C: Greater than or equal to 22 seconds but fewer than or equal to 27 seconds.

A Worker Was Observed for Four Cycles in a Repetitive