GAMS World Forum

Dear GAMS-users,

I'm trying to formulate a linear problem with three decision variables, however somehow I am not getting it to work properly.
For example we have a production problem with three decision variables:
- Quality of production inputs (Quality 1,2,3, etc.) - binary variable
- Production technology (Technology 1,2,3, etc. producing product 1,2,3, etc.) - continuous variable
- Transportation area (Area 1,2,3.. etc.) - binary variable(?)

I have worked with models with two decision variables and linearized them with help from this site: https://www.leandro-coelho.com/lineariz ... variables/ but somehow I cannot seem to get this to work with three variables.
Does anyone have a clue how to solve these kind of problems while keeping them linear?

Kind regards,
GFA

Hello, do you need the product of three variables?
If so, you can linearizing the product of two binary variables (Quality of production and Transportation area); this generate a new binary variable (suppose QT).
Finally, you can linearizing the product of a binary and a continuous variable (QT and Production technology)

I hope this can help you.
Bye!