TimeQuest How to Analyze Slow Ripple Clock

You mean is there a way to specify where it does and does not add delays? Not that I know of. From one standpoint, you always want it to add delays to meet timing, since you're design won't work if it doesn't. But it's nice to be able to disable, as adding delays can mask something that might be a mistake(missing multicycle hold) or designed better. The Estimated Delays Added report in the .fit.rpt is another way to see if the router is adding delays where it shouldn't. (Note that on a design with one clock on a Global, this estimated delay added will not be 0).