A firm has 5 jobs waiting to be processed These jobs are log

A firm has 5 jobs waiting to be processed. These jobs are logged in as they arrived. All dates are specified as planning calendar days. Assume that all jobs arrived on day 180, today\'s date is 200.

Using the CR decision rule, in what sequence would the jobs be processed?

Solution

The CR rule or the critical ratio rule uses the critical ratio. Critical ratio is calculated by dividing the time remaining until a job’s due date by the total shop time remaining for the job. Total shop time is the setup, processing, move, and expected waiting times of all remaining operations.

CR = (Due date - today\'s date)/total shop time remaining

In the question mentioned above, today\'s date is 200. Information on due date and shop time remaining is not given. We need them for calculating the exact schedule.

But applying thumb rule, the job with the lowest CR will be performed next and the the job with the highest CR will be performed last.