report_timing -from [all_inputs] -nworst 1000 -sort_by group \
-delay_type min_max
report_timing -to [all_outputs] -nworst 1000 -sort_by group \
-delay_type min_max
Improper I/O delay constraints can lead to impossible timing closure. The implementation tools are timing driven and work on optimizing the placement and routing to meet timing. The design impacts the overall QoR if it cannot meet the I/O path requirements and the I/O paths have the worst violations.