What is 7QC Tools-Seven Quality Control Management Tools

What is 7QC Tools-Seven Quality Control Management Tools

7QC tools is used in industry from part/product development phase to delivery phase.7QC tools is used in various phase of continuous improvement and waste removing from process like Six Sigma.PDCA and Lean Management.

7 QC Tools are 

1.Stratification

2.Histogram

3.Check Sheet

4. Fishbone Diagram(Cause & effect diagram)

5.Pareto Chart 

6.Scatter Chart

7.Control Chart

1.Stratification

  This method is used for data dividing in sub-categories by this we find out information from that we understand existing problem and solve the same.

For example if a auditor visit an industry on following dates

Un-Stratified Data Vs Stratified Data

2.Histogram

  This quality tools is used for day wise process defect data study.Histogram data helps us to prioritising the process defect factors and also identified that in which defect area we need immediate action for defect improve.   

3.Check Sheet

  Check sheet is a table for calculating data and analysing the same.Purpose of check sheet is listed important process defect check points and update the same or marking the status on their occurrence, from this we understanding the progress,defect types and cause of defects.

4.Pareto Chart

   Pareto chart show us the important factors of reason from that major cause of failure occur.In Pareto chart the individual factors are represent by a bar graph in descending order of there impact and the cumulative total is shown by a line graph as shown in image below.

This chart is based on 80-20 rules means 80% of problem occur because of 20% of major factors in process and remaining 20% of problem occurs because of 80% of minor factors.

5.Scatter Chart

  Scatter chart is used to identify the relationship between two variables,these variable often represent possible cause and effect.The diagram shows the relationship between volunteer satisfaction scores and volunteer orientation training.

 

6.Control Chart

    Control chart is used to see the process is stable and capable within current conditions.control chart have a average line and upper line for upper control limit(UCL) and a lower line is for lower control limit(LCL) , by comparing these data you can draw conclusion that the process is in controls or out of controls,control chart is one of the best quality tool it is very good tool for controls variations in production process.

7.Cause and Effect(Fish-bone Diagram)

When we face a problem in process,it is very critical to identify the root cause before finding a solution.This cause is grouped in categories that is materials,people,equipment,methods,environments etc these categories gives structure to the diagram.By Fish-bone diagram we structure a brainstorming session.Once the diagram built why-why analysis methods is used to identify the root cause of the effect.

• It find the way to improve the process
• Fish-bone diagram locate bottlenecks in process
• It helps to identify root cause of the problem