Shahrzad Valizadeh

What if I have defined the variable "y" within the loop over days of the week. I mean:for day in days_of_week:         y = {}        for r in blood_types:            for i in num_hospitals:        ...

Let's consider the constraint only for the variable "y". As I mentioned before, I have: days_of_week = ["Monday", "Tuesday", "Wednesday", "Thursday", "Friday", "Saturday", "Sunday"] and: constraint...

Thank you for your quick response. There is no more constraint linking y and yy, and by the wrong result I mean, Tuesday which is in constraint_days_Loc, is a non order day. Definitely, by the foll...

Thank you so much Marika for your time and suggestions. That was so valuable to me.

import sysimport gurobipy as gpfrom gurobipy import Model, GRBfrom datetime import datetimefrom gurobipy import quicksumfrom gurobipy import max_from gurobipy import LinExpr  next_demands_OPM is a ...

Thank you Marika for your time. In fact, I'm trying to write the constraint provided in the inserted image. I tried your suggestion and defined auxiliary variable to the model, but the problem stay...