A correction surrounding the Users Preference Setting (UPS) issue affecting calendars which was employed in Primavera P6.7SP1 & P6.7 SP2 & SP4 has not solved the problem described by Rufran's Primavera Scheduling Tips & Tricks 01-13 (UPS). Tasks not using calendars aligned to the UPS or Admin Setting remain a problem. For example: a one day 10-hour activity will take two days because the default “Time Period” is set to 8 hours instead of 10-hours. These are just one of the many unwanted variances that needs to be addressed. Read on and learn what this is all about.