SPC 8 Rules and Types of Control Chart
About the Lecture
The lecture SPC 8 Rules and Types of Control Chart by Grey Campus is from the course Six Sigma Green Belt Training. It contains the following chapters:
- The Different Rules
- Rational Subgrouping
- - Instructions
Included Quiz Questions
In control chart, we draw two lines, UCL & LCL. The reason behind is
- To represent process variability due to assignable causes
- To represent process variability due to chance causes
- Artistic i.e., Looks beautiful
Control plan is a
- Plan for control of X
- ISO document
- Plan for control of Y
- Plan for control of X & Y
A point is out of control means
- Variations due to special causes are present
- Rejections are happening, start control
- Common causes are not present
- Control limits to be recalculated
Control limits are derived from
- Process data
- Customer CTQs
- Pareto Diagram
Control limits ….
- Can only be changed by changing the process
- Come from customer requirements
- Represent what someone wants the process to do
- Can sometimes be changed by changing the requirements of product or service
Control charts are used to
- establish stable operations
- recognize type of variation in a process
- decide on improvement strategies
- None of them
Control chart concept is used for,
- Process Stability
- Process Capability
- Process Monitoring
Which of these is a limitation of Run Charts
- Slow to detect special causes variation
- Don’t detect common causes variation
- Don’t detect special causes of variation
- Slow to detect common causes of variation
If you observe a special cause situation on a control chart
- immediately search for a root cause
- wait to see if special cause returns
- inform the team and urge them to do better
- launch a 6-sigma project
After identifying Xs that have an impact on the Y, first focus on
- High Impact Xs, out of our control
- Low Impact Xs, out of our control
- High Impact Xs, in our control
- Low Impact Xs, in our control
Author of lecture SPC 8 Rules and Types of Control Chart
Grey Campus
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