Originally posted by: UMQX_Olfat_ELMahi

Hello i am trying to use Alternative key word for:

dvar interval aplAct1Pj in TAp1PktP;
dvar interval aplAct1PRnoProcshttp://j in 0..nbTsk1P-1 optional;

the tasks aplAct1P should do something like that:
for all(r in 0..nbTsk1P-1)
forall(j in TAp1PktP) (j mod nbTsk1P ==0) => alternative ( aplAct1P[j], aplAct1PRnoProcs[r])

i understand i should use all key work but i can not figure out how ?

can you help my with the correct syntax

Thanks
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Originally posted by: UMQX_Olfat_ELMahi

i used the syntax:

it gives no error but i am afraid if it is not correct:
also not sure how to enforce capacity constraints now ??

forall(i in TAp1PktP)
alternative(aplAct1P[i], all(p in noProcs, j in 0..nbTsk1P-1: j == i mod nbTsk1P ) aplAct1PR[p][j]);
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Originally posted by: SystemAdmin

Hello,
I'm not sure to understand what you want to model. Do you want to state that there are noProcs ways to execute a task aplAct1P[i] and that each of these different ways is modeled by an optional interval variable? In this case, what about:

dvar interval aplAct1P [i in TAp1PktP]; dvar interval aplAct1PR[i in TAp1PktP][p in noProcs] optional;   constraints 
{ forall(i in TAp1PktP) 
{ alternative(aplAct1P[i], all(p in noProcs) aplAct1PR[i][p]); 
} 
}

If you have capacity constraints on these optional interval variables, you can use noOverlap constraints or constraints on cumulFunctions.

Philippe

PS: To improve readability of the models posted on this forum, you can use "{code}" markups before and after your code.
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