How to pull from list based on patient label ?

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Leah R asked Jul 19 2022 at 12:53 PM Leah R commented Jul 20 2022 at 9:56 AM

How to pull from list based on patient label ?

Hello,

I am trying to model the functionning of an operating room. I modeled the process before, during and after the surgery.

Each patient has a label called rang_journee which is their surgery rank. If a patient A is ready to undergo surgery, they can only start the surgery if there is no patient with a lower rank than them in the model.

For example, patient 1's rank is 10 and patient 2's rank is 20. If both patient are in the model and patient 2 is ready to undergo surgery before patient 1, it will still not receive the surgery.

In order to model that I :

created a List in which I want to push all the rang_journee of the patient that are in the model but that did not start the surgery yet ;
created a "push to list" activity. It pushes the rang_journee in the list when the patient is created and release the token immediately (see figure 1)
created a "pull from list" activity just before starting surgery. It should work as a filter to only let the patient with the lowest rank start (see figure 2). I cannot seem to make it work though.

My question is : how can I change that "pull from list" activity so that it only allows the patient with the lowest rank to go to the next step ?

Thanks in advance !

Leah

Software Version:

FlexSim 22.1.0

list pull from list push to list

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Answer 1 · 2022-07-19T14:25:17Z

Clair A answered Jul 19 2022 at 2:25 PM Leah R commented Jul 20 2022 at 9:56 AM

Hi Leah,

Please find attached a small example 2022-07-19 Pull patient from list.fsm.

Each patient has a surgeryRank label. I push patients in a list when they arrive in the waiting room:

This list has a field for the surgeryRank label:

When I pull a patient, the list is ordered by the surgeryRank field:

This way the patient with surgeryRank = 1 is the first patient to be pulled, even if he was not the first patient in the list.

1658239802843.png (4.9 KiB)

1658239927438.png (5.2 KiB)

1658240033694.png (18.3 KiB)

2022-07-19-pull-patient-from-list.fsm (60.9 KiB)

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Leah R commented · Jul 19 2022 at 3:02 PM

Thank you, it works perfectly !

I just have one last question to be able to apply it to my model. I have several ORs (and thus several patient lists).

It is possible to adapt the name of the list to push the patient data into based on a label ?

For instance, something like PatientList{patient.ORnumber}

If it is not possible, i guess i will use a decide with as many ouptuts as the number of ORs I have.

Thanks in advance !

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Clair A Leah R commented · Jul 19 2022 at 3:58 PM

I would rather use a single list and add the OR index as a field in the list:

Then the query to pull the correct patient for that OR and ordered by surgeryRank would be:

WHERE ORindex = puller.ORindex ORDER BY surgeryRank ASC

See attached modified model 2022-07-19 Pull patient from list where OR is already known.fsm.

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2022-07-19-pull-patient-from-list-where-or-is-alre.fsm (68.1 KiB)

Leah R Clair A commented · Jul 20 2022 at 9:56 AM

Thank you, it works perfectly :)

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