Quality Flashcards
Quality vs Grade
Quality - the item does what it’s supposed to do
Grade - label different products or services
Prevention vs Inspection
Prevention - keep error out of process
Inspection - keeping error out of hands of customer
Control Chart
displays process stability and performance
Rule of 7
seven consecutive data points on a control chart; all on one side of the mean indicate the process is out of control
Benchmarking
comparing project to a known standard
Flowcharting
visual depiction of a process
Design of Experiments (DOE)
analyzes several variations at once
Pareto Chart
a type of chart containing both bars and line graph; contain both bars and lines 80/20 rule
Scatter Diagram
plot data points to show the relationship between 2 variables
Cause and Effect Diagram
shows how various factors might be linked to potential problems or effects (e.g. Ishikawa or Fishbone
Kaizen
Plan, Do, Check, Act cycle
Deming is known for:
14 points of quality management; poor quality is a result of management problems 85% of the time
Crosby is known for:
zero defects, cost of quality
Standard Deviation formula:
(Pessimistic - Optimistic)/6
What are the Standard Deviation confidence intervals?
1 Sigma = 68.26%
2 Sigma = 95.46%
3 Sigma = 99.73%
6 Sigma = 99.999%
