How to Set Operating Unit(Single Operating Unit or Multi Operating Units) for Concurrent Program?

Concurrent Programs are defined with an Operating Unit mode of 'S' for single Operating Unit or 'M' for Multiple Operating Units.

From backend you can check with the following query:

Select MULTI_ORG_CATEGORY
from FND_CONCURRENT_PROGRAMS
where concurrent_program_name = <<Concurrent Program Short Name>>;

From Application:
Navigation:- System Administration--> Concurrent --> Programs

OAF page will open. Select Request Tab and set Operating Unit Mode field.