Reliability of crankshaft induction-coils new vs. old design

A Weibull distribution model was developed for each diesel engine crankshaft induction hardening coil design that accurately determines and predicts the reliability of the coil. The developed reliability model quantified the unacceptable reliability of the original coil design with a median life of 1,187 cycles. The developed reliability model quantified a 860% improvement in the reliability of the new coil design with a median life of 11,366 cycles. The reliability comparisons of the coil designs were used to economically justify the permanent design change and required capital expenditure to replace all existing coils