Application of Robust Parameter Design
Department of Statistics, Allameh Tabatabee University, Beheshti – Ghassir Ave. Tehran, Iran.
E-mail: firstname.lastname@example.org, email@example.com
Abstract. The concepts of robust parameter design (RPD) are based on the philosophy of
Genichi Taguchi, who introduced the concepts after several years of research. Robust engi-
neering which is also referred to as Taguchi Methods, (TM), systematically evolved starting in
the 1950s and aims at providing industries with a cost eﬀective methodology for enhancing
their competitive position in the global market. In this study, RE Methods has been used to
improve the quality of oil pump housing production of Iranian diesel engine manufacturing
(IDEM) Company in which 134% improvement over the current condition has been achieved.
It is interesting to mention that the above wonderful result has been obtained under vast
conditions of production and operation environments, and increasing production capacity and
not imposing any further investment in factors of production.
Key words: Robust engineering, Taguchi method, parameter design.
One of important components in an engine is oil pump which causes the
necessary parts to be lubricated while engine is functioning. The performance
of oil pumps is measured by two quality characteristics, namely, outlet oil
ﬂow rate in liter/minute and outlet oil pressure in bar. The malfunctioning in
outlet oil ﬂow rate and pressure can be due to many reasons, like diﬀerent
components of oil pumps. However, the study showed that the large devia-
tions of about 17 quality characteristics from their target values of oil pump
housings have the ﬁrst priority among other components in improving the
performance quality of the oil pumps.
On the other hand, since in the context of performance quality, the ﬁnal
quality and cost of a manufactured product is determined to a large extent by
the engineering designs of product and its production process through
activities of oﬀ-line quality control methods, and since in the context of non-
industrialized countries, the oﬀ-line quality activities of system design and
tolerance design in product design and process design are negligible if not
Quality & Quantity (2005) 39: 175–188 Ó Springer 2005