I read the post in the link. http://communities.bentley.com/products/structural/structural_analysis___design/w/structural_analysis_and_design__wiki/29430.difference-between-the-local-and-global-deflection
Now I understand the meaning of local deflection and also that the DFF command uses local deflection values.
Given the definition in the above link, why is local deflection used to check serviceability? Should it not be global deflection?