Team Up Feasibility Calculation by Optimizer

Ivan_Lo_
Certified Master Anaplanner

Team Up Feasibility Calculation by Optimizer

Hi Community,

 

I am working on a simple team member setting model using optimizer but it keeps returning "The problem is infeasible" error.

Ivan_Lo__1-1638859677083.png

 

Here is my model:

- The module consist of a Nurse List and a Doctor List. It has three line items : Team, Success, and Team Up  Constrain.

 

Ivan_Lo__0-1638857300672.png

Ivan_Lo__1-1638859460818.png

 

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Team - It is the variable for optimizer. In optimizer, it has been set to integer Min = 0 and Max = 1

Success - It is a constant value (0 or 1). It indicates whether a specific Doctor-Nurse combination is workable or not. (0 - Not Work, 1 - Work). 

Team Constrain - It is the constrain line item for Optimizer.

 

Here is the setting in Optimizer

Ivan_Lo__1-1638858150296.png

 

 

 

In Team Constrain, I did try the below:

 

a) Team * Success >= 1

b) Team * Success = 1

c) Team * Success <= 1

 

Both a and b returned infeasible error. c return success but the solution is all zero in Team line item.

It is appreciated if any one of you can help or point me to the right direction. 

 

Thanks

 

 

1 REPLY 1
IdrisL
New Contributor

Re: Team Up Feasibility Calculation by Optimizer

Hello,

 

It looks like constraint (a) and (b) are not feasible because it requires all the combinations Doc/Nurse to be true (since the "summary" of "Team Up Constrain" is "All").

Contraint (c) returns a solution with all zeros in "Team" line item, which is correct according to the constraint definition. I think you are just missing a second constraint that says "each doctor needs to be have at least one nurse assigned".

You can this for example :

Screenshot 2021-12-07 at 12.19.28.png

Screenshot 2021-12-07 at 12.20.03.png

Screenshot 2021-12-07 at 12.20.52.png