The corner timing constraints in your library today for lower voltages may be extremely optimistic due to process variation and hide timing violations. They are overstating the timing slack in the design. You could be taping out with serious yield and power risks. Constraint uncertainty corrects corner based constraints for process variation and are an essential part of any advanced timing methodology. Please give us your email address, and company name, and we will take you to the article. Name * Name First Name Last Name Email Address * Company Name Thank you!Here is the link:https://drive.google.com/file/d/0By0wpWmgeRIDaVRtREFLczNfSFU/view?usp=sharing