Conversion Factors for the Cumulative Average Number of Direct Labor Hours per Unit
\(\begin{array}{c}
\begin{array}{c}
80 \% \text { Learning Rate }\
\text { ( } n=\text { cumulative production) }\
\begin{array}{rrrrrr}
\hline n & & n & & {n} & \
\hline 1 & 1.00000 & 19 & 0.53718 & 37 & 0.43976 \
2 & 0.90000 & 20 & 0.52425 & 38 & 0.43634 \
3 & 0.83403 & 21 & 0.51715 & 39 & 0.43304 \
4 & 0.78553 & 22 & 0.51045 & 40 & 0.42984 \
5 & 0.74755 & 23 & 0.50410 & 64 & 0.37382 \
6 & 0.71657 & 24 & 0.49808 & 128 & 0.30269 \
7 & 0.69056 & 25 & 0.49234 & 256 & 0.24405 \
8 & 0.66824 & 26 & 0.48688 & 512 & 0.19622 \
9 & 0.64876 & 27 & 0.48167 & 600 & 0.18661 \
10 & 0.63154 & 28 & 0.47668 & 700 & 0.17771 \
11 & 0.61613 & 29 & 0.47191 & 800 & 0.17034 \
12 & 0.60224 & 30 & 0.46733 & 900 & 0.16408 \
13 & 0.58960 & 31 & 0.46293 & 1,000 & 0.15867 \
14 & 0.57802 & 32 & 0.45871 & 1,200 & 0.14972 \
15 & 0.56737 & 33 & 0.46464 & 1,400 & 0.14254 \
16 & 0.55751 & 34 & 0.45072 & 1,600 & 0.13660 \
17 & 0.54834 & 35 & 0.44694 & 1,800 & 0.13155\
18& 0.53979 & 36 & 0.44329 & 2,000 & 0.12720
\end{array}
\end{array}
\begin{array}{cl}
90 \% \text { Learning Rate }\
\text { ( } n=\text { cumulative production) }\
\begin{array}{rrrrrr}
\hline n &&{n} & &n & \
\hline 1 & 1.00000 & 19 & 0.73545 & 37 & 0.67091 \
2 & 0.95000 & 20 & 0.73039 & 38 & 0.66839 \
3 & 0.91540 & 21 & 0.72559 & 39 & 0.66595 \
4 & 0.88905 & 22 & 0.72102 & 40 & 0.66357 \
5 & 0.86784 & 23 & 0.71666 & 64 & 0.62043 \
6 & 0.85013 & 24 & 0.71251 & 128 & 0.56069 \
7 & 0.83496 & 25 & 0.70853 & 256 & 0.50586 \
8 & 0.82172 & 26 & 0.70472 & 512 & 0.45594 \
9 & 0.80998 & 27 & 0.70106 & 600 & 0.44519 \
10 & 0.79945 & 28 & 0.69754 & 700 & 0.43496 \
11 & 0.78991 & 29 & 0.69416 & 800 & 0.42629 \
12 & 0.78120 & 30 & 0.69090 & 900 & 0.41878 \
13 & 0.77320 & 31 & 0.68775 & 1,000 & 0.41217 \
14 & 0.76580 & 32 & 0.67471 & 1,200 & 0.40097 \
15 & 0.75891 & 33 & 0.68177 & 1,400 & 0.39173 \
16 & 0.75249 & 34 & 0.67893 & 1,600 & 0.38390 \
17 & 0.74646 & 35 & 0.67617 & 1,800 & 0.37711 \
18 & 0.74080 & 36 & 0.67350 & 2,000 & 0.37114
\end{array}
\end{array}
\end{array}\)

-How long will it take to make 25 units if the third one took 6.5 hours and there is a 90 percent learning rate? Refer to the copy of Table G.1 above.
A) Fewer than or equal to 130 hours
B) Greater than 130 hours but fewer than or equal to 140 hours
C) Greater than 140 hours but fewer than or equal to 150 hours
D) Greater than 150 hours

Question

Conversion Factors for the Cumulative Average Number of Direct Labor Hours per Unit
\(\begin{array}{c}
\begin{array}{c}
80 \% \text { Learning Rate }\
\text { ( } n=\text { cumulative production) }\
\begin{array}{rrrrrr}
\hline n & & n & & {n} & \
\hline 1 & 1.00000 & 19 & 0.53718 & 37 & 0.43976 \
2 & 0.90000 & 20 & 0.52425 & 38 & 0.43634 \
3 & 0.83403 & 21 & 0.51715 & 39 & 0.43304 \
4 & 0.78553 & 22 & 0.51045 & 40 & 0.42984 \
5 & 0.74755 & 23 & 0.50410 & 64 & 0.37382 \
6 & 0.71657 & 24 & 0.49808 & 128 & 0.30269 \
7 & 0.69056 & 25 & 0.49234 & 256 & 0.24405 \
8 & 0.66824 & 26 & 0.48688 & 512 & 0.19622 \
9 & 0.64876 & 27 & 0.48167 & 600 & 0.18661 \
10 & 0.63154 & 28 & 0.47668 & 700 & 0.17771 \
11 & 0.61613 & 29 & 0.47191 & 800 & 0.17034 \
12 & 0.60224 & 30 & 0.46733 & 900 & 0.16408 \
13 & 0.58960 & 31 & 0.46293 & 1,000 & 0.15867 \
14 & 0.57802 & 32 & 0.45871 & 1,200 & 0.14972 \
15 & 0.56737 & 33 & 0.46464 & 1,400 & 0.14254 \
16 & 0.55751 & 34 & 0.45072 & 1,600 & 0.13660 \
17 & 0.54834 & 35 & 0.44694 & 1,800 & 0.13155\
18& 0.53979 & 36 & 0.44329 & 2,000 & 0.12720
\end{array}
\end{array}
\begin{array}{cl}
90 \% \text { Learning Rate }\
\text { ( } n=\text { cumulative production) }\
\begin{array}{rrrrrr}
\hline n &&{n} & &n & \
\hline 1 & 1.00000 & 19 & 0.73545 & 37 & 0.67091 \
2 & 0.95000 & 20 & 0.73039 & 38 & 0.66839 \
3 & 0.91540 & 21 & 0.72559 & 39 & 0.66595 \
4 & 0.88905 & 22 & 0.72102 & 40 & 0.66357 \
5 & 0.86784 & 23 & 0.71666 & 64 & 0.62043 \
6 & 0.85013 & 24 & 0.71251 & 128 & 0.56069 \
7 & 0.83496 & 25 & 0.70853 & 256 & 0.50586 \
8 & 0.82172 & 26 & 0.70472 & 512 & 0.45594 \
9 & 0.80998 & 27 & 0.70106 & 600 & 0.44519 \
10 & 0.79945 & 28 & 0.69754 & 700 & 0.43496 \
11 & 0.78991 & 29 & 0.69416 & 800 & 0.42629 \
12 & 0.78120 & 30 & 0.69090 & 900 & 0.41878 \
13 & 0.77320 & 31 & 0.68775 & 1,000 & 0.41217 \
14 & 0.76580 & 32 & 0.67471 & 1,200 & 0.40097 \
15 & 0.75891 & 33 & 0.68177 & 1,400 & 0.39173 \
16 & 0.75249 & 34 & 0.67893 & 1,600 & 0.38390 \
17 & 0.74646 & 35 & 0.67617 & 1,800 & 0.37711 \
18 & 0.74080 & 36 & 0.67350 & 2,000 & 0.37114
\end{array}
\end{array}
\end{array}\)

-How long will it take to make 25 units if the third one took 6.5 hours and there is a 90 percent learning rate? Refer to the copy of Table G.1 above.
A) Fewer than or equal to 130 hours
B) Greater than 130 hours but fewer than or equal to 140 hours
C) Greater than 140 hours but fewer than or equal to 150 hours
D) Greater than 150 hours

Quizplus · Accepted Answer

Using the table for the 90% learning rate:

For the third unit:
Cumulative average number of direct labor hours per unit = 0.72559

For the 25th unit:
Estimated number of direct labor hours needed for the 25th unit = 0.72559 * (25^0.152) = 0.72559 * 0.8236 = 0.5974

Therefore, estimated total direct labor hours needed for 25 units = 25 * 0.5974 = 14.935

The closest range provided in the answer choices is B, which is greater than 130 hours but fewer than or equal to 140 hours.