Intel® Quartus® Prime Standard Edition User Guide: Design Recommendations

ID 683323
Date 9/24/2018
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3.4.6. Set Fitter Effort to Standard Fit instead of Auto Fit

If your design MTBF is too low after following the other guidelines, you can try increasing the Fitter effort to perform more metastability optimization. The default Auto Fit setting reduces the Fitter’s effort after meeting the design’s timing and routing requirements to reduce compilation time.

This effort reduction can result in less metastability optimization if the timing requirements are easy to meet. If Auto Fit reduces the Fitter’s effort during your design compilation, setting the Fitter effort to Standard Fit might improve the design’s MTBF results. To modify the Fitter Effort, click Assignments > Settings > Compiler Settings > Advanced Settings (Fitter).