Hi;
suppose
I have a mixed integer problem maximizing Z
sets
y years /1, 2, 3…, n/
m months /1, 2, 3,…, 12/
w weeks /1, 2, 3,…, 7/
i facilities /F1, F2, F3, …,Fm/
parameters
C(i) capacity
Tlife(i) expected life time
Tini(i) age
positive variables
pA(y,m,b) production amount for A
pB(y,m,b) production amount for B
binary variables
x(i,y) investment decision for an old facility
I want to write a constraint for specific values of y such as “For y greater or equat to (Tlife(i) - Tini(i) + 1)” pA(y,m,b) + pB(y,m,b) =l= sum(i, C(i)*x(i,y)). How can I write such a constraint. Please help me!
I tried
Const(y,m,b)$(y.val ge Tlife(i) - Tini(i) +1)… pA(y,m,b) + pB(y,m,b) =l= sum(i, C(i)*x(i,y));
I know this expression is not true. But I don’t know how to write it. Please help me in writing such a constraint.
Thanks to everybody.
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