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Hannes D avatar image
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Hannes D asked Kari Payton answered

Implementing Base Stock

Hello !

We are trying to implement a Base stock model in Flexsim, however we have encountered some issues. The production line faces a constant demand pattern, which means that within each period a certain deterministic amount of items get pulled out from the FGI. The inventory in front of the sink is controlled by a simple reorder point system. Once the inventory level falls below a certain level, a new order has to be release from the source to the processor in front of the FGI. Therefore, the arrival pattern is inherently influenced by the deterministic demand pattern. Of course in order to get the production system run, we have to assume a certain initial inventory level. Questions: 1. How can I implement this demand pattern to Flexsim, meaning how can our FGI be decreased due to the external demand? 2. How is a reorder point system programmed? Is this done in the queue menu? “Flow” or “queue triggers”? Or maybe I have to track the inventory level via a User Event Script in a separate global table? Once the inventory level falls below a certain reorder point, anew order is released… @RalfGruber

I saw you answered a similiar question in 2013, however we can't seem to open the .flxsm file that was attached...

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base stock
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Kari Payton answered

Hi @Hannes D. I'm not completely sure if this addresses your problem. I asn't able to find the Base stock model you're referring to. However, you can model demands, inventory, and refills using process flow. In the example:

1 - A demand is created on a times schedule.

2 - Initial inventory is 200 items that are pushed to a list

3 - A source waits for the inventory to get low to 50 items. Once the inventory = 50, 25 tokens are created and pushed to the list to create more inventory.inventoryrefill.fsm


inventoryrefill.fsm (18.9 KiB)
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Up to 12 attachments (including images) can be used with a maximum of 23.8 MiB each and 47.7 MiB total.