When you need to master something you go through 3 stages:
1- You have a desire to do something
2- You learn the theory concerning this topic
3- You apply using tools you learned
Regarding to quality tools you do the same process, but the main question is what tool I can use in particular situation, do I need to use all the tools..!!
The answer for this question is According to the situation you face
For simplicity we classify tools to 4 groups:
A-Basic quality tools:
1- Pareto chart 2- Histogram 3- Fish Bone 4- Flow Chart 5- Check points
6- Scatter Diagram 7- Control Charts
B- Planning and management tools:
1- Activity Network Diagram 2- Affinity diagram 3- Interrelationship Diagram
4- Matrix Diagram 5- Priorities Matrix 6- Process Decision
7- Tree Diagram
1- Root cause analysis 2- Five Whys 3- PDCA-PDSA 4- SIPOC
D- Innovation and creativity tools:
1- Creative thinking 2- Brainstorming 3- Mind Mapping
4- Analogies 5- Lateral thinking 6- Triz 7- SCAMPER
Now after you have a guide line for tools , the 1st question you should ask your self , what is my problem , what I need to do , do I need to plan or to improve .
Then you need to select a specific tool, let’s take Histogram as an example:
What does it do?
A histogram is a basic graphing tool that displays the relative frequency or occurrence of data values-or which data values occur most and least frequently.
A histogram illustrates the shape, centering, and spread of data distribution and indicates whether there are any outliers.
The frequency of occurrence is displayed on the y-axis, where the height of each bar indicates the number of occurrences for that interval (or class) of data, such as 1 to 3 days, 4 to 6 days, and so on.
Classes of data are displayed on the x-axis. The grouping of data into classes is the distinguishing feature of a histogram
When to use?
Histograms can be used throughout an improvement project. In the Measuring, you can use histograms to begin to understand the statistical nature of the problem.
In the Analysis, histograms can help you identify potential causes that should be investigated further. They can also help eliminate potential causes.
In the Improve phase, you can use histograms to characterize and confirm your solution. In the Control plan, histograms give you a visual reference to help track and maintain your improvements.
Why to use?
It is important to identify and control all sources of variation. Histograms allow you to visualize large quantities of data that would otherwise be difficult to interpret. They give you a way to quickly assess the distribution of your data and the variation that exists in your process.
The shape of a histogram offers clues that can lead you to possible causes. For example, when a histogram has two distinct peaks, or is bimodal, you would look for a cause for the difference in peaks.
David Moceri YouTube Interview
The concept I need you to know is “it’s not
a matter of mastering all the tools; it’s the art of using the right tool
You can find a full set of tools
and how to develop and use it here: