Material Section Coefficient (Cs)
Most processes have a mimimum material capablity before secondary proceses are required
to produce the design thickness. The section coefficient (Cs) takes that into account and applies an on-cost factor for that situation according to the process.
For a discussion of minimum material section and its impact on component cost see
the book book "Process Selection from Design To Manufacture - 2nd Edition"
by Swift and Booker -
ISBN: 0-7506-5437-6