on monday morning, baxter industries has the following jobs waiting for processing in two departments…
on monday morning, baxter industries has the following jobs waiting for processing in two departments, milling and drilling, in that order.\n\njob\ttime required (hours)\tmill\tdrill\n216\t4\t7\n327\t8\t10\n462\t10\t3\n519\t5\t6\n258\t9\t15\n617\t14\t12\n\ndevelop a minimum makespan schedule using johnsons rule.\nthe schedule using johnsons rule is -select- -select- -select- -select- -select- -select-.\n\nchoose the correct gantt chart with the minimum makespan schedule.\nthe correct graph is -select-.
Answer
Explanation:
Step1: Identify the shortest time
Find the shortest processing - time among all jobs in both the milling and drilling departments. The shortest time is 3 (for job 462 in the drilling department).
Step2: Schedule job 462
Since the shortest time is in the drilling department, job 462 is scheduled last.
Step3: Remove job 462 and find the next - shortest time
Remove job 462 from the list. The next - shortest time is 4 (for job 216 in the milling department). So, job 216 is scheduled first.
Step4: Continue the process
Among the remaining jobs, the next - shortest time is 5 (for job 519 in the milling department). So, job 519 is scheduled second.
Step5: Next - shortest time
The next - shortest time is 7 (for job 216 in the drilling department, but 216 is already scheduled). The next one is 8 (for job 327 in the milling department), so job 327 is scheduled third.
Step6: Next - shortest time
The next - shortest time is 9 (for job 258 in the milling department), so job 258 is scheduled fourth.
Step7: Final job
The last remaining job is 617, which is scheduled fifth.
Answer:
216 - 519 - 327 - 258 - 617 - 462