Exam 17: Supplement J Operations Scheduling

Table J.2 Stu Dent reviews the syllabi he received on the first day of class and pulls out his planner. He has seven major assignments that must be completed before the end of the semester. -What is the average flow time for all assignments scheduled in an SPT sequence?

Table J.2 Stu Dent reviews the syllabi he received on the first day of class and pulls out his planner. He has seven major assignments that must be completed before the end of the semester. -Stu whips up a schedule based on the critical ratio criterion. What is the average number of assignments in the system?

Table J.2 Stu Dent reviews the syllabi he received on the first day of class and pulls out his planner. He has seven major assignments that must be completed before the end of the semester. -Stu decides to adopt an EDD sequence for the assignments, which seems like a very logical approach. Which assignments will he be submitting late?

The ________ priority sequencing rule is typically applied in a front-office customer service setting.

Table J.1 The framing department has six jobs waiting to be processed. It is now time zero. Times are expressed in terms of days. -Using the information in Table J.1 and the SPT rule, what is the average flow time?

Table J.17 A company must take on seven new projects. Each project has a planning stage and a design stage, and the planning stage must be completed before the design stage can begin. Also, two project teams are available to work on these projects: Team 1 works only on planning stages of projects, and Team 2 works only on design stages of projects. The times to complete the project stage, in days, are shown in the following table. -Using the information in Table J.17 and Johnson's rule, develop a schedule that minimizes makespan for these seven jobs. Assume that job C could be neatly split into two equal parts, each having half of the processing time on each machine as the full job C. Using your original sequence, but splitting job C, what is the reduction in makespan for the seven jobs?

Table J.1 The framing department has six jobs waiting to be processed. It is now time zero. Times are expressed in terms of days. -Using the information in Table J.1 and the FCFS rule, what is the average flow time?

Table J.14 Gable Bakery has five cake orders to be processed today. Each cake has to go through the baking and decorating processes. The baking and decorating times are estimated as follows: -Use the information in Table J.14. If all cakes are to be picked up at 11:00 a.m., what is the latest time that Gable should start making these cakes?

The shortest processing time rule tends to produce a large variance in ________.

Makespan is the total amount of time to complete a single job or the first job in a group of jobs.

The ________ is a priority sequencing rule that is calculated by dividing the time remaining until a job's due date by the total shop time remaining for the job, including the setup, processing, move, and expected waiting times of all remaining operations, including the operation being scheduled.

A(n) ________ is the object receiving service or being manufactured.

Table J.8 Auto Data produces custom engineering testing equipment. The following six jobs are currently in the design department. The time since each one arrived, the processing time, and the due date are shown below. All times are expressed in terms of days. Let now be the beginning of Day 1. -Using the information in Table J.8 and the EDD rule, what is the average days past due?

What are multiple-dimension scheduling rules? Provide examples and discuss how each rule performs.

Table J.18 -Use the information Table J.18 and sequence the jobs using the SPT rule. What is the average past due?

Table J.7 The following four jobs just arrived (end of hour 0) at Workstation A. They are the only ones waiting to be processed. -Using the information in Table J.7 and the S/RO rule, what is the average flow time at Workstation A?

Use the information in the preceding table and sequence the six jobs using FCFS, SPT, and EDD. Calculate the average flow times, average early times, and average past due.

________ is the amount of time by which a job missed its due date.

Use the information in the table and sequence the six jobs using the slack per remaining operation algorithm. Calculate the average flow times and average lateness. All jobs arrived at time zero and are ready at time zero.

Determining a production sequence for a group of jobs in a two-station flow shop to minimize the makespan has the advantage of: