Nice article about the use of sensors in stamping and relation to Industry 4.0.  If you don’t think you can justify sensors, my recommendation is to track coil-by-coil performance [bad AND good] to see effect of metal props. You might find that success is a function of more than just YTE or hardness. Sensors like tonnage monitors will help focus corrective actions.

https://www.thefabricator.com/article/stamping/r-d-update-industry-4-0-and-the-use-of-sensors-in-sheet-metal-forming

-Danny Schaeffler, https://www.EQSgroup.com and https://www.Learning4M.com  ​