In this paper the identification of the suitable effective tools based on DMAIC (define-measure-analyze-improvecontrol) model for automotive component manufacturing was investigated with respect to detailed determination of the five phases of DMAIC. Currently the implementation of the DMAIC in industries has numerous versions in the classification for every phase. One of the issues is the application of tools for each phase is different by practitioners and secondly, the verification of the phases is also not clearly defined. The detailed steps and processes of DMAIC usually depend on the experiences, knowledges and availability of the data collection. Thus, in this paper, detailed adaptation process for each phase in DMAIC is investigated through published literature, current implementation of DMAIC in case study industry and production reject rate in case study industry. Based on the investigation and implementation from the case study industry, the result shows adaptation of DMAIC with suitable tools for each phase complements well with the quality improvement program. The reject rate of the product as determined through the developed DMAIC tools is similar with the case study industry. © IEOM Society International. © IEOM Society International.