I want to generate agents from Source blocks on a custom schedule
For example: 2000 agents in 1st hour, 4000 agents in 2nd hour, 2000 in the third hour
How can I create such a Source block?
I am trying with
"Arrival Schedule" and "Rate Schedule" but not sure if thats the right approach
Arrival Schedule is indeed a good way to approach the problem.
The above should reflect the scenario you mentioned.
Related
Utilizing a source generating agents on an Interarrival time basis, I would like to stop the source block from generating agents after a certain amount of time passing so that the model can continue to process the agents.
One option to encapsulate all the logic inside the source block, without external events or variables, would be to select Multiple agents per arrival as true and then have a conditional statement for the number of agents, for example time() > 10 ? 0 : 1, so that after 10 model time units there will no agents arriving
Sure. If it is a inter-arrival source block, make it use a variable as the interrarrival time, of type double:
Then, create an event that triggers once only, after your specific time. Make it change the variable to 0 as below. Make SURE to trigger it not at time 0 (as in the screen but when you need it!):
NOTE: Do not set myRate = 0;. Instead, set it to infinity` to actually have no more arrivals.
I am using Anylogic for a simulation-modeling class, and I am not anylogic or coding smart. My last and only coding class was MatLab based about 16 yrs ago. I have a few questions about how to implement modeling concepts in a discrete model with anylogic.
How can I add/inject agents directly into a queue downstream from a source? I have tried adding an additional source to use the “Calls of inject() function,” but I am not sure how to implement it after selecting it ( example: what do I do after selecting the Calls of inject() function). I have the new source feeding directly into the queue where I want the inject.
How can I set the release of an agent to a defined schedule instead of a rate? Currently, I have my working model set to interarrival time. But I would like to set the agent release to a defined schedule. (example: agent-1 released at 120 seconds, agent-2 released at 150 seconds, agent-3 released at 270 seconds)
Any help would be greatly appreciated, especially if it can be written in a “explain to me like I am 5yrs old” format.
Question 1:
If you have a source connected directly to a queue, then when you call source.inject() an agent will be created at the source block and go to the queue. If you have 1 source with multiple possible destinations, then you will have to use select output blocks and some criteria to go from the source to the desired queue.
Since you mentioned not being a strong programmer, this probably wouldn't be for you, but I often find myself creating agents via add_population and then just adding them to an ArrayList until I am ready to pull them into the DES flow. Really, there are near infinite ways to control agent flow within AnyLogic.
Question 2:
Option a: Arrivals by "Arrival Table in Database" You can link an AnyLogic database table to Excel, and then the source block will just have an agent arrive based on that table.
Option b: Arrival Schedule - you could set this up manually within the development environment or load your schedule from a database. I prefer option a over option b given your brief description.
Option c: Read in data to variable and then write code to release based on next arrival time. 1,000s of ways to do this, but one example could be a list of doubles (your arrival times), set an event to delay until next arrival, call inject function, remove that arrival from the list. I think option a would be best for you, but given that AnyLogic allows you to add java code, there are no limits to how sophisticated you could make your arrival logic.
For 2) You could also use an event or a dynamic event. The action could be source.inject(1); and you can schedule them to your preferences with variables. Just be vigilant that you re-start the events if necessary.
There is a demo-model from AnyLogic for dynamic events.
I am modeling ticket system with various SLA. The model must contain several service blocks with different reaction time ( from 2 to 32 hours). In the service block only working hours should be taken into account. So in the service block timeout should stop when non-workong hours and on the weekend. Could you please kindly tell me how i can realize it?
Thank you very much in advance!
I can think of two answers, one simplified but works in many cases, the other more advanced and probably more accurate:
Simplified approach: I would set the model in hours and keep everything running as is without any stop. So, at the end of the simulation, if the total time is 100 hours and you know that you have 8 hours/day with 5 days/week, then you'd know the total duration is 2.5 weeks. Of course, this might have limitations or might become more complex later on if you want day-specific actions (e.g. you want to differentiate between Monday, Tuesday, etc.)
Advanced more accurate approach: Create resources whose capacities are defined by schedule and assigned them to your services. Create a schedule and specify the working hours in that schedule. Check the below link to learn more about schedules. I call this the more advanced approach because you need to make sure the schedule is defined correctly and make sure all elements in the model are properly controlled (e.g. non-service blocks such as source, delays, etc.).
https://help.anylogic.com/topic/com.anylogic.help/html/data/schedule.html?resultof=%22%73%63%68%65%64%75%6c%65%73%22%20%22%73%63%68%65%64%75%6c%22%20
I personally would use the first approach if the model is rather simple and modeling working hours is enough for analysis. Otherwise, I'd go for option 2.
Finally, another option I'd like to highlight is the "suspend/resume" functions. I am only adding this because you asked "how to stop timeout". So these functions specifically stop and resume timeout. But you'll need to define the times at which they are executed (through an event for example).
I would like to know how to measure the total time one agent expend in the system in discrete events simulation.
Can I use this code? Time=time() timeDS.add(time()-Time); but allocating the agent.Time+time() in the exit in the source and timeDs.add(time() agent.Time); at on enter in the sink?
Thank you
Short answer: Yes you can.
You can also use the "On startup" and "on destroy" code fields of the agent properties, this is the true life span of your agent.
(And next time, maybe try it first ;) )
I am using Quart Scheduler. I want to trigger to in such a fashion so as it excludes timing from xx:xx:xx to yy:yy:yy on day specified (monday, friday. sunday). I know how to exclude particular day. but don't know how not to trigger on given time block on given day?
Can anybody know anything about it?
Please make use of Calendar and HolidayCalendar available in Quartz to achieve this. The Cron expression in Cron-Trigger can also be written smartly to achieve this as well.
Looking at http://www.quartz-scheduler.org/docs/examples/Example3.html, it seems that one can create different job set to do the same task. For each job one can attach a schedule.
If you dont want to run a particular task on say sunday between 1pm and 10pm, but want it to run on sunday the remainder of the day, then you can create two jobs [set to do the same task]. For one give the schedule with time restrictions 00:00 to 13:00. And for the second give time restriction of 22:00 to 23:59.
I hope I understood your problem correctly ...