LS: Layout Scanner
LS is a vapour-ware. There is hardly any development now.
The role of LV is to "scan" a layout to detect areas that can be improved on. To illustrate the value of LV, one such "scan" feature is discussed here.
Consider a net with 3 fan-outs from a P&R layout:
The following diagrams show the shortest connection from A to B, A to C and A to D assuming that only rectilinear routing is used. Obvious, the connection from A to C in the layout is much longer than the shortest connection.
If we also consider connections from any pair of inputs, the connection between C and D is also very much longer than the shortest connection, as illustrated below.
A connection that is much longer than the shortest connection is usually due to poor floorplan or congestion. A tool than can feedback such connections is useful for the P&R engineer to make further improvement on the quality of the layout.
You can contact me regarding LS by sending a email to firstname.lastname@example.org.