Understanding of preempting and collision

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Michal Klodawski asked Apr 20, '17 Michal Klodawski edited Apr 25, '17

Understanding of preempting and collision

Hi, I would like to understand preempting in ProcesFlow. For this reason I have built simple model. I have two queues and two operators:

On start Operator 1 goes to Queue 2 and Operator 2 goes to Queue 1. On collision situations each of them stop doing his task and starts doing taks of the other Operator (so after collision Op1 go back to Queue 1 etc.)

I am attaching model. Can anybody show me how to combine collision and preemption. In my opinion in such simple model it is chance that I will understand it :)collision-preempt.fsm

collision preempting

collision.png (56.0 KiB)

collision-preempt.fsm (20.8 KiB)

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Answer 1 · 2017-04-21T17:47:09Z

Sam Stubbs answered Apr 21, '17

As it currently stands, when you have a collision detection occur during a Process Flow travel activity, it can cause some problems. Perhaps if you could explain what it is you're trying to accomplish by having preemption and collision happen, then I could find another way to approach the problem. For example, if you're trying to do a hand off situation, where one operator is handing off an item to the other, there's other ways to accomplish that. Or some other situation, there may be a better way to try and approach the situation you're trying to accomplish.

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Answer 2 · 2017-04-25T13:43:15Z

Michal Klodawski answered Apr 25, '17 Michal Klodawski edited Apr 25, '17

Hi Sam, I would like to simulate something like bucket brigades in picking. For example three pickers assemble (fulfill) order as they move from left to right. Whenever the fastest (last one) finishes an order (reaches the right end of the line), he leaves it and walks back to take over the work of his predecessor, who walks back and so on, until the first worker walks back to start a new order.

Like you said, maybe there are other ways to accomplish that. Can you help me? Please :)

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