Jackie is the owner and the manager of an auto repair company. In order to be fair to all the customers, Jackie decides to use the FCFS priority rule in job sequencing. Currently, four cars need to be repaired. Assume that the cars arrive in the order listed, that is, A first, then B, then C, then D. The estimated labor times (in days)and promise dates are shown in the following table. Customers usually do not pick up their cars early. Today is day 0.
Based on the FCFS sequence, calculate the following performance measures: (a)makespan, (b)average job flow time, (c)average number of jobs in the system, (d)average job tardiness.

Question

Jackie is the owner and the manager of an auto repair company. In order to be fair to all the customers, Jackie decides to use the FCFS priority rule in job sequencing. Currently, four cars need to be repaired. Assume that the cars arrive in the order listed, that is, A first, then B, then C, then D. The estimated labor times (in days)and promise dates are shown in the following table. Customers usually do not pick up their cars early. Today is day 0.
  Based on the FCFS sequence, calculate the following performance measures: (a)makespan, (b)average job flow time, (c)average number of jobs in the system, (d)average job tardiness.

Quizplus · Accepted Answer

The Answer of Jackie is the owner and the manager of an auto repair company. In order to be fair to all the customers, Jackie decides to use the FCFS priority rule in job sequencing. Currently, four cars need to be repaired. Assume that the cars arrive in the order listed, that is, A first, then B, then C, then D. The estimated labor times (in days)and promise dates are shown in the following table. Customers usually do not pick up their cars early. Today is day 0.
  Based on the FCFS sequence, calculate the following performance measures: (a)makespan, (b)average job flow time, (c)average number of jobs in the system, (d)average job tardiness.

Jackie Is the Owner and the Manager of an Auto