Concurrent Program “Pending Standby” status

There are instances when we run a concurrent program & it goes to “Pending Standby” status. 
Sometimes this status would change after few minutes but, there are instances that this remains in same status forever. 
Please carry out following steps to solve this issue: 
Login to System Administrator Responsibility;---> System Administrator-------->Concurrent manager--------------> AdministratorLook for Concurrent Manager Name "Conflict Resolution Manager"
See whether the Conflict Resolution manager is running, if is it not, activate it and it shall solve the standby status issue.
If the Conflict Resolution manager is running Click “Verify” button.Once completed with the verification, resubmit the previous hanging request, and it should run without any problem.

Here is a brief about some Important concurrent Managers: 
Internal Concurrent Manager — The master manager is called the Internal Concurrent Manager (ICM) because it controls the behavior of all of the other managers, and because the ICM is the boss, it must be running before any other managers can be activated. The main functions of the ICM are to start up and shutdown the individual concurrent managers, and reset the other managers after one them has a failure.

Conflict Resolution Manager — The Conflict Resolution Manager (CRM) functions to check concurrent program definitions for incompatibility rules. However, the ICM can be configured to take over the CRM's job to resolve incompatibilities.

Standard Manager — Another important master Concurrent Manager is called the Standard Manager (SM). The SM functions to run any reports and batch jobs that have not been defined to run in any specific product manager. Examples of specific concurrent managers include the Inventory Manager, CRP Inquiry Manager, and the Receivables Tax Manager.