A Histogram is a pictorial representation of a set of data, and the most commonly used bar graph for showing frequency distributions of data/values. It is created by grouping the measurements into “cells” or “class ” or “bins”. It is similar to the bar chart, but it groups data points into classes and plot frequencies.

Check Sheet is also called as Tally Sheet and is used for collecting and analyzing data. Data collection is an important activity in the problem solving process as it provides a basic for further action. A data may be numerical, observations and opinion. This is the basic and very important tool of 7 QC Tools

7 QC Tools are also known as Seven Basic Quality Tools and Quality Management Tools. These graphical and statistical tools are used to analyze and solve work-related problems effectively. The 7 Quality Tools are widely applied by many industries for product and process improvements, and to solve critical quality problems. 7QC tools are extensively used