When defining Pblocks, you might look at utilization from a placement
perspective only. However, for static Pblocks with the CONTAIN_ROUTING constraint
enabled, routability is also an important factor. Unlike Pblocks without a containment
requirement, the router must find a solution using the available routing tiles inside
the static Pblock. Therefore, it is important to stay within the recommended utilization
value. This approach provides more solution space for the router and allows you to
converge to a solution more quickly. See the utilization recommendations for flat
designs using:
report_qor_assessment -full_assessment_details