Choosing between OV and DI

Entry square area = 1555 sq.mm
Entry square side = 40 mm
Roll diameter = 193 mm

Then epsilonSI = 0.2

If lamk (SQ-to-SQ lambda) > 2 then choose an oval; if lamk < 1.92 then choose a diamond.

If 1.92 < lamk < 2 then modify entry/exit square.