What Is a Critical Input?

In the Six Sig­ma approach, crit­i­cal inputs refer to the key fac­tors or vari­ables that have a sig­nif­i­cant impact on the out­put or out­come of a process. Learn the impor­tance of iden­ti­fy­ing crit­i­cal inputs for process improve­ment, and the mean­ing of the equa­tion Y=(f)X.