We want some personalization to be done on Work Order display page.
There are multiple lines available in Operations and each line has Duration Value Populated Separately.
I want to sum Duration Value in each of the line adding a new field on header.
Please let me Know if this is Possible using personalization.
You should post such question to OA Framework related community (https://forums.oracle.com/community/developer/english/e-business_suite/technology_-_oa_framework) instead of Functional group.
Typically, you can do it by using a DFF on the Header.
In addition, you will need to customize Controller (CO) to override the processFormsRequest method.
In the method, you can loop over the Lines VO, sum the appropriate column, and assign it to Header VO's appropriate column.
Strictly Do Not Use Trigger for such requirements, as it will cause locking issues.