Originally posted by: Rahul Ghate

I am working on scheduling problem where we have constraint of resources. I  wanted to split the activities of the schedule into parts of different size as to optimize the use of resource. What kind of decision variable and constraints will be required to achieve that.

Thanks in Advance.

Originally posted by: rdumeur

Dear Rahul,

To split activities, you can use interval variables,  sequence variables and the noOverloap constraint. 

All these constructs are documented here:

https://www.ibm.com/support/knowledgecenter/SSSA5P_12.7.0/ilog.odms.ide.help/OPL_Studio/opllangref/topics/opl_langref_scheduling.html

It might help you to have a look  at the 'sched_sequence' OPL which seem to do something similar as what you want:

  - it splits the house building process in multiple activities

  - worker activities are constrained using sequence variables and the noOverlap constraint

  - construction activities are ordered using precedence constraints.

I hope it helps,

Cheers,

           Renaud