A restaurant has a cashier unit with average service time is 2 minutes per customer with standard deviation is 1 minutes. Based on previous observation, there are in average 15 customers come to the cashier. If one customer requires space area 70cm x 50cm and the cashier unit requires 100cm x 100cms, determine total space required for the cashier unit including customers who waiting for service.
The average response time on a database system is five seconds. During a one minute observation interval, the idle time on the system was measured to be twelve seconds. Using an M/M/1 model for the system, determine the following: - System utilization - Average service time per query - Number of queries completed during the observation interval - Average number of jobs in the system - Probability of number of jobs in the system being greater than 10
@Saeideh Fallah Fini or other viewers, I posted this message in clip 8 and 7, but I think more people will see it if I post it here. Can anybody suggest in which order shall I watch these clips? I watched the clip 7, Introduction to Queuing Theory, because the name is self explanatory, but I dont know what's next. Much appreciate it.
Thank you so much for such a nice examples. I have a question, if you could please answer. As per the M/M1 Queue, the delay is 1/μC−λ. Here if λ is greater than μC, the delay will be a negative value. How do you explain this?
I am not sure what is C in your formula, but in M/M/1 systems "Delay in system" or W is defined as 1/(μ−λ). As you can see if λ>=μ, then W is meaningless. Note that in a M/M/1 system we always want 0
@ ah i see, that makes sense, I recently got this problem and I’m trying to find the relevant course: “suppose there are two queues A and B, A has average processing time of 3 mins, B 4 mins, any 1 job will goes to whichever queue available, initially both queues are available, if there are 10 jobs ahead of me, what should I see on my countdown timer (estimated waiting time) as the 11th job in the queue”, do you know which topic I should look into?
The average response time on a database system is five seconds. During a one minute observation interval, the idle time on the system was measured to be twelve seconds. Using an M/M/1 model for the system, determine the following: - System utilization - Average service time per query - Number of queries completed during the observation interval - Average number of jobs in the system - Probability of number of jobs in the system being greater than 10
The average response time on a database system is five seconds. During a one minute observation interval, the idle time on the system was measured to be twelve seconds. Using an M/M/1 model for the system, determine the following: - System utilization - Average service time per query - Number of queries completed during the observation interval - Average number of jobs in the system - Probability of number of jobs in the system being greater than 10
A restaurant has a cashier unit with average service time is 2 minutes per customer with standard deviation is 1 minutes. Based on previous observation, there are in average 15 customers come to the cashier. If one customer requires space area 70cm x 50cm and the cashier unit requires 100cm x 100cms, determine total space required for the cashier unit including customers who waiting for service.
The average response time on a database system is five
seconds. During a one minute observation interval, the
idle time on the system was measured to be twelve
seconds. Using an M/M/1 model for the system,
determine the following:
- System utilization
- Average service time per query
- Number of queries completed during the observation
interval
- Average number of jobs in the system
- Probability of number of jobs in the system being
greater than 10
@Saeideh Fallah Fini or other viewers, I posted this message in clip 8 and 7, but I think more people will see it if I post it here. Can anybody suggest in which order shall I watch these clips? I watched the clip 7, Introduction to Queuing Theory, because the name is self explanatory, but I dont know what's next. Much appreciate it.
clip 7,6,5,4,2,1,3,17,16,15,14,13,12,10,9,8
4:17 why did you multiply by 2, any calculations or just assumptions made
very good. thank u so much!
nice presentation. could you give me some information on how to change bidimensional into single dimension for example p(i,j)(i,j) to P(i,j)
Thank you so much for such a nice examples. I have a question, if you could please answer. As per the M/M1 Queue, the delay is 1/μC−λ. Here if λ is greater than μC, the delay will be a negative value. How do you explain this?
I am not sure what is C in your formula, but in M/M/1 systems "Delay in system" or W is defined as 1/(μ−λ). As you can see if λ>=μ, then W is meaningless. Note that in a M/M/1 system we always want 0
@@saeidehfallahfini1173 Perfectly makes sense. Thank you so much. So nice of you.
what is the order of the video i should watch.. The playlist is out of order
Hello, for the Mcdonald's example, is there a typo on the slides? It should be "receives" an average of 10,000 pounds of potatoes, not "uses" ?
why you multipled by 2 in panic example
I dont get that either
Me too
Video 4:29: I don't understand why you multiply with 2 when tanks are 1/4 empty
idk too bro
@@whitneyvivian1422 same
Which major in university has this subject? Is it math or computer science?
Industrial engineering, in operations research class
@ ah i see, that makes sense, I recently got this problem and I’m trying to find the relevant course: “suppose there are two queues A and B, A has average processing time of 3 mins, B 4 mins, any 1 job will goes to whichever queue available, initially both queues are available, if there are 10 jobs ahead of me, what should I see on my countdown timer (estimated waiting time) as the 11th job in the queue”, do you know which topic I should look into?
Can anybody tell what the textbook is?
W. L. Winston, Operations Research, Application and Algorithms, 4th Edition, Thomson Learning (Brooks/Cole Publishing Co)
@@saeidehfallahfini1173 Thank you so much, Professor Fini.
poggers
The average response time on a database system is five
seconds. During a one minute observation interval, the
idle time on the system was measured to be twelve
seconds. Using an M/M/1 model for the system,
determine the following:
- System utilization
- Average service time per query
- Number of queries completed during the observation
interval
- Average number of jobs in the system
- Probability of number of jobs in the system being
greater than 10
The average response time on a database system is five
seconds. During a one minute observation interval, the
idle time on the system was measured to be twelve
seconds. Using an M/M/1 model for the system,
determine the following:
- System utilization
- Average service time per query
- Number of queries completed during the observation
interval
- Average number of jobs in the system
- Probability of number of jobs in the system being
greater than 10