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Exam 14: Operations Scheduling and Sequencing

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Question 41

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Explain the three categories of criteria used to evaluate job sequencing performance. For each category, provide two example measures.

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Question 42

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Indirectly, appointments reduce the cost of providing a service because the service provider is idle less each workday.

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Question 43

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The time needed to process a given set of jobs is called:

A print shop has four jobs that have to be processed through their only five-color press. They usually use the first come, first served (FCFS) rule of scheduling jobs. However, the customers are waiting in the lobby for these jobs so the shop wants to minimize the average waiting time. They are going to use the shortest processing time rule to do so. Processing times for each job are as follows (assume this is the arrival order) : Job A, 30 minutes; Job B, 17 minutes; Job C, 12 minutes; and Job D, 39 minutes. -Using the first come, first served (FCFS) rule to sequence these jobs, the average waiting (flow) time is _____.

In a two-resource sequencing problem:

Differentiate between scheduling and sequencing.

Staff scheduling needs all of the following EXCEPT:

The table below includes processing times and due dates for five jobs. $\begin{array}{|l|l|l|}\hline & \text { Processing } & \text { Days Due } \\\hline \text { Job } & \text { Time (days) } & \text { From Today } \\\hline \text { A } & 16 & 24 \\\hline \text { B } & 23 & 30 \\\hline \text { C } & 22 & 40 \\\hline \text { D } & 8 & 28 \\\hline \text { E } & 10 & 18 \\\hline\end{array}$ -Using the shortest processing time (SPT) rule, the average flow time for the five jobs is _____.

If the highest priority is to minimize the average job lateness, then the job sequence should begin with those jobs requiring:

Gantt charts can be used to:

Since all jobs eventually get done, job sequencing has no effect on resource utilization.

The earliest due date (EDD) rule minimizes the maximum of jobs past due but doesn't perform well on average flow time, work-in-process (WIP) inventory, or resource utilization.

A restaurant needs the following number of wait staff to serve its evening guests. $\begin{array} { | l | l | l | l | l | l | l | l |} \hline \text { Day: } & \text { M } & \text { Tu } & \text { W } & \text { Th } & \text { F } & \text { Sa } & \text { Su } \\\hline \begin{array} { l } \text { Minimum Number of Wait Staff } \\\text { Needed: }\end{array} & 5 & 2 & 1 & 4 & 6 & 7 & 2\\\hline\end{array}$ How many employees are needed so that each has two consecutive days off? Construct a work schedule for these employees.

Which of the following is NOT a consideration when designing an appointment system?

The chief disadvantage of the shortest processing time (SPT) rule is:

Give at least five examples of service organizations (and employee types) where, due to high variability in customer demand, staff-scheduling problems are prevalent.

The following five jobs, along with their processing time and due dates, are given below. $\begin{array}{|l|l|l|}\hline & \text { Processing } & \text { Days Due } \\\hline \underline{\text { Job }} & \underline{\text { Time (days) }} & \text { From Today } \\\hline \text { A } & 8 & 12 \\\hline \text { B } & 4 & 9 \\\hline \text { C } & 3 & 6 \\\hline \text { D } & 7 & 7 \\\hline \text { E } & 5 & 20 \\\hline\end{array}$ -Using the earliest due date (EDD) rule, the average lateness for the five jobs is _____.

A movie theater requires the following minimum number of employees, each of whom is required to have two consecutive days off. $\begin{array}{|l|c|c|c|c|c|c|c|}\hline \text { Day: } & \text { M } & \text { Tu } & \text { W } & \text { Th } & \text { F } & \text { Sa } & \text { Su } \\\hline \text { Minimum Personnel Required: } & 1 & 1 & 3 & 2 & 5 & 4 & 3 \\\hline\end{array}$ -Using staff scheduling method, the most overstaffed day is _____.

A print shop has four jobs that have to be processed through their only five-color press. They usually use the first come, first served (FCFS) rule of scheduling jobs. However, the customers are waiting in the lobby for these jobs so the shop wants to minimize the average waiting time. They are going to use the shortest processing time rule to do so. Processing times for each job are as follows (assume this is the arrival order) : Job A, 30 minutes; Job B, 17 minutes; Job C, 12 minutes; and Job D, 39 minutes. -Using the shortest processing time (SPT) rule to sequence these jobs, the final sequence is_____, if A is the first person to arrive and D is the last.