How to pull by priority changing by time?

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WillRS asked Oct 31, '24 WillRS commented Nov 1, '24

How to pull by priority changing by time?

Hello everyone!

In my model, I have 5 docks that have different occupancy windows for each type of item, depending on the time. There are 3 types of items.

For example, in the first hour of simulation, 3 docks should prioritize in ascending order (1, 2, and 3) and 2 docks in descending order (3, 2, and 1). In the second hour, the logic reverses: 3 docks should prioritize in descending order (3, 2, and 1) and two in ascending order.

In this example model, all items are arriving at the same time to test the logic, but in the real system there is a distribution of arrivals, according to a schedule.

Any idea how I can program this logic?

Thanks!

Priority_Change_by_time_Resource.fsm

Software Version:

FlexSim 23.2.0

processs flow acquire resource sql queries

priority-change-by-time-resource.fsm (41.8 KiB)

5 |100000

Attachments: Up to 12 attachments (including images) can be used with a maximum of 23.8 MiB each and 47.7 MiB total.

Answer 1 · 2024-11-01T14:53:23Z

Gustavo Teodoro answered Nov 1, '24 WillRS commented Nov 1, '24

For the item arrival using distribution, the best approach is use the process flow based on the block:

In the source, you can set an hourly distribution for item arrivals:

For the prioritization logic, I created a table listing the available docks and their prioritization based on time. The logic in process flow updates the dock prioritization every hour according to the set logic, alternating between the priorities in column 1 and column 2 of the GlobalTable1.

The model is attached.
priority-change-by-time-resource_Solution.fsm

1730471401224.png (34.4 KiB)

1730471477840.png (103.3 KiB)

1730471578749.png (503.3 KiB)

priority-change-by-time-resource-solution.fsm (119.3 KiB)

· 1

5 |100000

Attachments: Up to 12 attachments (including images) can be used with a maximum of 23.8 MiB each and 47.7 MiB total.

WillRS commented · Nov 01 at 06:56 PM

Thanks for the answer!

I liked the time control logic for each priority. I was imagining the need to use many lines of code... lol cool!

In this same modeling approach, how could I write SQL syntax so that the Docks would exclusively pull a certain type, instead of prioritizing it?

This would be a new scenario, where the docks would be dedicated to a certain item Type for a while and then switch

Thanks again!

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