The Bus Skew report covers all the bus skew constraints set in the design using set_bus_skew. The bus skew report is currently not included inside the timing summary report and you must manually generate the bus skew report in addition to the timing summary report for complete timing signoff.
When run from the Tcl Console, the bus skew report can be scoped to one or more
hierarchical cells using the -cells option. When the
report is scoped, only paths with the datapath section that start, end, or are fully
contained inside the cell(s) are reported. This option is not available from the Report
Bus Skew GUI.