The quality loss function is one of the tools of the Six Sigma methodology. The function assigns a cost to an observed value, that is larger as far as it is from the target.
ss.lf(lfa.Y1, lfa.Delta, lfa.Y0, lfa.L0)The observed value of the CTQ (critical to quality) characteristic that will be evaluated.
The tolerance for the CTQ.
The target for the CTQ.
The cost of poor quality when the characteristic is \(Y_0 + \Delta\).
A number with the evaluated function at \(Y_1\)
Taguchi G, Chowdhury S,Wu Y (2005) Taguchi's quality engineering handbook. John Wiley
Cano, Emilio L., Moguerza, Javier M. and Redchuk, Andres. 2012. Six Sigma with R. Statistical Engineering for Process Improvement, Use R!, vol. 36. Springer, New York. https://link.springer.com/book/10.1007/978-1-4614-3652-2/.
#Example bolts: evaluate LF at 10.5 if Target=10, Tolerance=0.5, L_0=0.001
ss.lf(10.5, 0.5, 10, 0.001)
#> [1] 5e-04