Query to find runtime of a concurrent program

The following query finds total run-time in minutes for a concurrent program.

SELECT /*+ rule */
       rq.parent_request_id                   "Parent Req. ID",
       rq.request_id                          "Req. ID",
       tl.user_concurrent_program_name        "Program Name",
       rq.actual_start_date                   "Start Date",
       rq.actual_completion_date              "Completion Date",
       ROUND((rq.actual_completion_date -
           rq.actual_start_date) * 1440, 2)   "Runtime (in Minutes)"      
  FROM applsys.fnd_concurrent_programs_tl  tl,
       applsys.fnd_concurrent_requests     rq
 WHERE tl.application_id        = rq.program_application_id
   AND tl.concurrent_program_id = rq.concurrent_program_id
   AND tl.LANGUAGE              = USERENV('LANG')
   AND rq.actual_start_date IS NOT NULL
   AND rq.actual_completion_date IS NOT NULL
   AND tl.user_concurrent_program_name = 'PRC: Generate Draft Revenue for a Range of Projects'  -- <change it>
   -- AND TRUNC(rq.actual_start_date) = '&start_date'  -- uncomment this for a specific date
 ORDER BY rq.request_id DESC;