ممكن حد يساعدني بحل الثلاث اسئلة التالية:
1. Develop a table of the factory status at the beginning of each one-hour time
interval for the following serial system under the condition that the system maintains
a total work-in-process of 5 jobs. Develop this table for the system status for 15
hours of operation. The workstation processing times (in hours) are listed in the
squares representing the workstations. The initial (time 0) starting work-in-process
distribution is (5,0,0). That is, 5 jobs in the first workstation and none elsewhere
and assume that the first job begins processing at time 0. Compute the cycle times
(time in the system) for the first 4 completed jobs assuming that all 5 initial jobs
entered the system at time 0.
(2.3.1) there are 3 machines, the time is
2. Reconsider Problem 1 starting with the initial conditions: work-in-process is
(2,3,0). Assume further that the first job in line at workstations one and two have
already completed one hour of processing. Compute the cycle times for all jobs
that are completed during the 15 hours of operation, assuming that all 5 initial jobs
entered the system at time 0. Explain why the cycle times for the first 4 completed
jobs are not valid as the long-run average.
3. Develop a spreadsheet model to solve Problem 2.
1. Develop a table of the factory status at the beginning of each one-hour time
interval for the following serial system under the condition that the system maintains
a total work-in-process of 5 jobs. Develop this table for the system status for 15
hours of operation. The workstation processing times (in hours) are listed in the
squares representing the workstations. The initial (time 0) starting work-in-process
distribution is (5,0,0). That is, 5 jobs in the first workstation and none elsewhere
and assume that the first job begins processing at time 0. Compute the cycle times
(time in the system) for the first 4 completed jobs assuming that all 5 initial jobs
entered the system at time 0.
(2.3.1) there are 3 machines, the time is
2. Reconsider Problem 1 starting with the initial conditions: work-in-process is
(2,3,0). Assume further that the first job in line at workstations one and two have
already completed one hour of processing. Compute the cycle times for all jobs
that are completed during the 15 hours of operation, assuming that all 5 initial jobs
entered the system at time 0. Explain why the cycle times for the first 4 completed
jobs are not valid as the long-run average.
3. Develop a spreadsheet model to solve Problem 2.