Order of variables

[saheli de]

Hi all,

I want to create a constraint that introduces ordering between variables.

Use case:

variable 1 -> Door_1

variable 2 -> Door_2

variable 3 -> Door_3

All doors have floating point positions that can range from 0 to 100%

I would like to build a constraint such that Door 2 can only be > 0 if Door_1 is =100:

i.e. Door_2 > 0 if Door_1 = 100; if Door_1<100  then Door_2 = 0.

I tried using if2 and if3, but they doesn't give optimal results.

[saheli de]

Added question:

Is there an inbuilt gekko method to implement order.