Solution : https://service.sap.com/sap/support/notes/1665133 (SAP Service marketplace login required)
Key words : 
prerequisites development request solution apply, 'reference time' option, aif offline processing, reference timeframe, offline reason, previously shown, plan activities, 'timeframe relevant', terms planner
Related Notes : 
       
| 1657664 | Process Control 10.0 Support Package 08- Master Note |