Duration % Complete not Rolling Up

The roll up or summarization uses costs to calcuate the % summary complete. You just cant use duration or how many activies are completed its not weighted but if you assign cost then you have a true weigh value and can calculate % complete because you have a basis to do this just having activities by themselves you have no basis to measure against. 

if you are looking at the schedule % complete the Summary % complete when displayed on an organize band, will ALWAYS be calculated as Budget Costs for Work Scheduled X 100 divided by Budget at Completion or (BCWS * 100) / BAC, regardless of what earned value technique is selected for the activity's WBS.

The performance % complete column the Summary % complete when displayed on an organized band will always be calcuated as Budget Costs of Work Performed X 100 or (BCWP • 100) I BAC, regardless of what earned value technique is selected for the activity's WBS.

Emma,

Duration % complete does role up.

Activity % complete does not role up, even if all of your % complete types are Duration.