The existing field work is done in an automotive subsidiary company to produce automotive industry products in
Bursa region. The firm has set up ISO TS 16949 Quality Management System in Automotive Industry. They
sustain the existing system of quality management succesfully. One of the tools that the company utilize to comply
with the continual improvement of the quality management system is implementing six sigma methodology. Six
sigma methodology is in progress in all departments of the company by regular trainings and team meetings.
When Six sigma methodology is implemented in a company, the types and scope of the statistical implementations
have to be improved and widened as defined in Table 3. In general while implementing Six-Sigma methodology in
Supply Chain Management effectively in a company, basic statistical tools have to be employed. With regard to
result of the statistical assessments, the required corrective and/or improvement actions have to be encouraged and
embraced to the relevant company. In addition to this fact, any realized new implementation has to be monitored and
evaluated with regard to compliance with the company's owned 6-Sigma implementation procedure and right and
proper route has to be followed up, measured and verified by suitable statistical control and analysis methods.In this
study, the utilized data have been obtained from detailed review and investigation of company's previous production
activity records, and relevant assessments has been made. Within the six-sigma implementation scope, the relevant
potential and real defects have been observed and analized via statistical methods and real causes of the defects have
been found, classified, reduced and sequenced in order of priority. The defined basic causesof defects have been
rated with fish-bone diagram, histograms and pie-diagrams. Finally, as per the found basic causes relevant pareto
diagrams have been constructed and relevant corrective and/or improvement actions recommended for initiation by
the company as per priority rating. Six sigma methodology was introduced and acquired. With the scope of this