Originally posted by: nburana

Hi,

I'm working on University timetabling problem using constraint programming. Now, I would like "calculating the teaching workload assigned to the teachers" by summation teaching workload of each discipline that taught by the teacher as the following constraint.
     forall(x in Teacher)
       TeachingWorkload[x] == sum(r in InstanceSet: r.discipline in PossibleTeacherDiscipline[x]) r.tw*(teacher[r] == ord(Teacher,x));

The model was work and I got the feasible solution if I used small value data in r.tw. But if I used high value data, the model was no solution. I have no idea where is wrong because I never been used TeachingWorkload variable in other constraints. Please helping me.

Regards,

Hi,

1) You have a dedicated CP forum at https://www.ibm.com/developerworks/community/forums/html/forum?id=11111111-0000-0000-0000-000000002067

2) When you say no solution, it gives an info saying no solution or you wait for a long time and you got no solution ?

regards

Originally posted by: nburana

Hi, 

I took just a few time and the program said no solution as shown in attached picture.

Regards