In this paper a review of systematic use of 7 QC tools is presented. The main aim of this paper is to provide an easy
introduction of 7 QC tools and to improve the quality level of manufacturing processes by applying it.QC tools are the means for
Collecting data , analyzing data , identifying root causes and measuring the results. these tools are related to numerical data
processing .All of these tools together can provide great process tracking and analysis that can be very helpful for quality
improvements. These tools make quality improvements easier to see, implement and track.