This rule reports the specified number of nodes with the highest fan-out, which can create timing challenges for a design.
You can specify that the Design Assistant use this rule by turning on Top nodes with highest number of fan-outs: <n> under Timing closure in the Design Assistant rules list in the Design Assistant page of the Settings dialog box. You can use the High-Fanout Net Settings dialog box, which is available from the Design Assistant page, to specify the number of nodes you want the Design Assistant to report. The Design Assistant Settings report lists the options you turn on and the settings you specify.
To specify the number of fan-outs above which you want the Design Assistant to report nodes, click High-Fanout Net Settings to open the dialog box and type the number in the Report all nodes with more than < n > fan-outs box.