Integration of Mahalanobis-Taguchi System and activity based costing for remanufacturing decision

Abstract

Remanufacturing is a process that returns the second hand and used product that have the
performance similar or better than the new product. The remanufacturer cannot be
predicting the end of life (EOL) of crankshaft to remanufacture, repair or reject due to the
limited information provided by Original Equipment Manufacturer (OEM) which depend on a
traditional inspection to make a decision. Subsequently, Traditional Cost Accounting (TCA)
which the manufacturing overhead are driven by the production volume are being applied.
The aim of this work is to develop a distinctive pattern of crankshaft and identify the critical
and non-critical parameter of crankshaft based on the Mahalanobis Taguchi System (MTS),
then applied the Activity Based Costing (ABC) as a method of estimation for the
remanufacturing cost of crankshaft. In methodology, the scatter diagram is construct to
develop the pattern recognition using T Method-3, Taguchi orthogonal array (OA) are
applied to identify the important parameter using T Method and lastly, the ABC system is
analysed the costing of critical parameters. Quality inspection is the most important in quality
inspection to reduce the number of parameter of each engine model and to compare which
costing system can produce the cheapest price. Therefore, it is also to prove the combination
of applying MTS method with ABC system will make the profitability and manufacturing cost
are more accurate.