Five jobs are waiting for processing through two work centers. Their processing time (in minutes) at each work center is contained in the table below. Each job requires work center Alpha before work center Beta. According to Johnson's rule, which job should be scheduled first in the sequence?
$$\begin{array} { | c | c | c | }
\hline \text { Job } & \text { Alpha } & \text { Beta } \
\hline R & 20 & 10 \
\hline \mathrm { S } & 25 & 35 \
\hline \mathrm { T } & 50 & 20 \
\hline \mathrm { U } & 15 & 35 \
\hline \mathrm { V } & 55 & 75 \
\hline
\end{array}$$
A) R
B) S
C) T
D) U
E) V

Question

Five jobs are waiting for processing through two work centers. Their processing time (in minutes) at each work center is contained in the table below. Each job requires work center Alpha before work center Beta. According to Johnson's rule, which job should be scheduled first in the sequence?
$$\begin{array} { | c | c | c | } 
\hline \text { Job } & \text { Alpha } & \text { Beta } \
\hline R & 20 & 10 \
\hline \mathrm { S } & 25 & 35 \
\hline \mathrm { T } & 50 & 20 \
\hline \mathrm { U } & 15 & 35 \
\hline \mathrm { V } & 55 & 75 \
\hline
\end{array}$$
A) R
B) S
C) T
D) U
E) V

Quizplus · Accepted Answer

Johnson's rule for scheduling jobs through two work centers involves arranging jobs in order of increasing processing time, where the shortest processing time at either work center determines the sequence. The job with the shortest processing time in either work center goes first. Job U has the shortest processing time in work center Alpha (15 minutes), making it the first job to be scheduled according to Johnson's rule.

Five Jobs Are Waiting for Processing Through Two Work Centers