Process instances can be executed in the order they were created. TIBCO ActiveMatrix BusinessWorks allows you to specify a sequencing key on process starters that determines which process instances to execute sequentially. Process instances with sequencing keys that evaluate to the same value are executed in the order they were started. Process instances can have sequencing keys that evaluate to different values, but only process instances with the same value for the sequencing key are executed sequentially. Process instances with different sequencing key values can be executed concurrently.