Five Jobs Are Waiting for Processing Through Two Work Centres

question 19

Multiple Choice

Five jobs are waiting for processing through two work centres. Their processing time (in minutes) at each work centre is contained in the table below. Each job requires work centre Alpha before work centre Beta. According to Johnson's rule, what is the optimum sequence of jobs and the minimum time for completion of all jobs? $$\begin{array} { | c | c | c | } \hline \text { Job } & \text { Alpha } & \text { Beta } \\\hline R & 20 & 10 \\\hline \mathrm { S } & 25 & 35 \\\hline \mathrm { T } & 50 & 20 \\\hline \mathrm { U } & 15 & 35 \\\hline \mathrm { V } & 55 & 75 \\\hline\end{array}$$

• A) V-T-S-U-R; 225
• B) U-R-T-S-V; 175
• C) R-S-T-U-V; 240
• D) U-S-V-T-R; 200
• E) V-U-T-S-R; 250

---

Definitions:

Production

The process of creating goods and services using labor, machinery, and raw materials.

Finished Goods

Items that have finished being manufactured and are prepared for purchase by consumers.

Inventory

The raw materials, work-in-progress, and finished goods that a company holds for the purpose of sale in the future.

November

The 11th month in the Gregorian calendar system.