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Nitin Namdeo Girawale*, Jyotsna Balasaheb Jadhav, Chaitali Krushnarao Ukey and Charulata Sunil Falak


We provide an introductory overview of the Six Sigma development
and improvement processes. A historical perspective is provided. Six
sigma is a statistical concept which helps us to define the problems
systematically, provides tools to measure and analyze the influential
factors, identifies the improvements that can be implemented easily
and ensure that the changes which have been made, are kept alive
through a control process and maintains the gains over the time. Six
Sigma have been utilized by manufacturing industries to decrease cost
and improve quality and productivity by reducing variation and
production defects. To achieve six sigma quality, a process must
produce not more than 3.4 defects per million opportunities if the
output is normally distributed. There are two six-sigma sub methods
namely DMAIC and DMADV. Enhancing the quality and operational
aspect of the manufacturing process is key and thus, many companies
are integrating traditional six sigma. Six sigma as a problem solving approach has been used
in various fields to provide the fundamentals of variation management and reduction in order
to assist in transforming established methodologies in to new and efficient techniques.

Keywords: Six sigma, Sigma level, DMAIC, DMADV, Training.

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