KB32148: How is the column IS_REP_EXEC_TM_MS of the MicroStrategt Enterprise Manager warehouse table IS_REP_FACT calculated ?

Strategy Enterprise Manager warehouse table IS_REP_FACT contains information about report job executions. 
 
Some of the columns of this table are the following: 

• IS_REP_EXEC_ST_TS - Timestamp of the execution start.
• IS_REP_EXEC_FN_TS - Timestamp of the execution finish.
• IS_REP_QU_TM_MS - Queue duration in milliseconds.
• IS_REP_EXEC_TM_MS - Execution duration in milliseconds.
• IS_REP_ELAPS_TM_MS - Difference between start time and finish time; includes time for prompt responses.

IS_REP_EXEC_TM_MS column is the difference between IS_REP_ELAPS_TM_MS (elapsed time) and IS_REP_QU_TM_MS (queue time).
 
And, IS_REP_ELAPS_TM_MS column is the difference between IS_REP_EXEC_ST_TS and IS_REP_EXEC_FN_TS.