A placement quality parameter for {HEAD ~ each} of the block configurations is derived based on a set of block placement rules and on the layout quality parameters, and {TAIL ~ a final block configuration} is selected by comparing the placement quality parameters corresponding to particular block configurations 
A placement quality parameter for { HEAD ~ each } of the block configurations is derived based on a set of block placement rules and on the layout quality parameters , and { TAIL ~ a final block configuration } is selected by comparing the placement quality parameters corresponding to particular block configurations
OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH