Six Sigma
Concepts
CTQs
Variation
DPMO
Sigma Level
5 Phases of Sigma
Define
Measure
Analyze
Improve
Control
Define
Project is defined
Team is selected
Understand what is important to the customers
Determine the performance outcome to improve
Performance outcome to improve = Y
Y = f(x)
Example is Leadtime for technician to show up
Project is launched
Measure
Determine size and scope of the problem
Measure performance on Y
Analyze
Data is analyzed to determine causes or factors impacting performance
Diagnose which x factors impact Y
Perform root cause analysis
Improve
Develop solutions
Pilot solutions
Implement solutions
Control
Establish controls to ensure gains are sustainable
Our example
Client requires app
Y is the time we take to make the app
Y = f(x)
X = art, graphics, planning, mechanics