Seven Quality Control tools are fundamental instruments to improve the quality of the product.
They are used to analyze the production process, identify the major problems, control fluctuations of product quality, and provide solutions to avoid future defects.
Statistical literacy is necessary to effectively use the seven Quality control tools.
These tools use statistical techniques and knowledge to accumulate data and analyze them.
seven Qc tools are utilized to organize the collected data in a way that is easy to understand and analyze. Moreover, from using the seven Qc tools, any specific problems in a process are identified.
7 QC tools always include:
1. CHECK SHEET
It is used to easily collect data.
Decision-making and actions are taken from the data.
2. PARETO CHART
It is used to define problems, to set their priority, to illustrate the problems detected, and determine their frequency in the process.
3. CAUSE AND EFFECT DIAGRAM
It is used to figure out any possible causes of a problem. After the major causes are known, We can solve the problem accurately.
4. HISTOGRAM
It shows a bar chart of accumulated data and provides the easiest way to evaluate the distribution of data.
5. SCATTER DIAGRAM
It is a graphical tool that plots many data points and shows a pattern of correlation between two variables.
6. FLOW CHART
It shows the process step by step and can sometimes identify an unnecessary procedure.
7. CONTROL CHART
It provides control limits which are generally three standard deviations above and below average, whether or not our process is in control.
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