Equip Yourself with Seven Essential Quality Control Tools as an LSS Practitioner
- Keivan Heidari
- Sep 19, 2024
- 2 min read
It's super important to have the right tool for the job, just like you need different tools in your toolbox for various tasks.
What are the tools?
Check Sheet:
The most fundamental tool is the check sheet. It involves the simple task of counting data for future analysis later in the process.
Fishbone Diagram (Cause & Effect Diagram):
The purpose of fishbone diagrams is to identify the main cause of a problem. The diagram resembles a fish's skeletal structure, with each primary bone symbolizing a distinct category of potential root cause, and further investigation is depicted as smaller bones.
Histogram:
This bar graph displays the frequency of a dataset, typically continuous. The histogram provides insight into the data's central tendency, variability, and distribution. It serves as a convenient overview. However, it does not reveal the specific sequence or order of the data.
Pareto Chart:
Based on the 80/20 principle, the Pareto chart shows that 80% of outcomes come from 20% of inputs. This concept, introduced by Dr. Joseph Juran, highlights the importance of focusing on the vital few rather than the trivial many. The chart helps prioritize process improvements by arranging causes by occurrence or impact.
Control Chart:
A control chart is a statistical instrument used to analyze process data over time and differentiate between special cause and common cause variations.
Scatter Diagram :
Scatter plots, also known as scatter diagrams, display the graphical relationship between paired data points on the X and Y axes. They serve as visual tools for illustrating the correlation that would be analyzed in regression studies.
Stratification:
The graph presents data classified by its origin. It is helpful to examine the data based on particular categories such as shift, gender, location, machines, or suppliers.
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