How to make a concurrent program to run for a single operating unit in R12?

N--> System Administration --> Concurrent --> Program
a) Enter Program Name/Program Short Name and click on "Go" button
b) Click on Update Pencilbar
c) Go to Request Tab
d) Select the Operating Unit Mode "Single" from List
e) Click on "Apply" button

By doing this you will be asked to enter the Operating unit, while submitting the program. Whatever operating unit you select here will be set as global organization and would be accessible through routine "FND_GLOBAL.Org_ID" If you have any value sets based on Table, which need to access only global org specific value, you need to give "Org_ID = FND_GLOBAL.Org_ID" condition in SQL used for value sets. Also, when you are submitting the request from back end, you need to set the org for this request by calling the routing "FND_REQUEST.SET_ORG_ID('')"