I was extremly disappointed in the lack of attention on the DFF module. We also used Valor currently for DFF checks and we thought it would be possible to match a considerable amount of checks up front early with the designers. I spent a considerable amount of time reviewing the tool and the interface is the absolute worst I have seen in all of the mentor tools. It was so horrible I had to write scripts outside of mentor to be able to edit entries in the cell boxes easier. For example if I had a complex arrray of rules that was set up for a 6 layer board you could not easily transition to a 12 layer without INDIVIDUALLY selecting each box, one at a time and entering the value manually. There was no copy paste or copy tricks like CES and selecting the corners. Another thing we attempted is bascially a design that mimics every DRC/DFF condition that it was supposed to check and I found specific problems with silkscreen checks and acute angles. It needs a serious amount of re-write and I shouldn't have to waste my time creating a test case to prove that some features are either confusing or not working all together. Even though I love the mentor expedition toolset; I can honestly say if they don't focus more effort on updates, this module will fail on the pcb market.
I entered a reasonable amount of defects and ERs for this also.
Read my MSDOC attachement to save yourself time.
Application Support Analyst
DFF_2007.2.doc 234.5 KB