The 80:20 rule is associated with which of these tools?

The 80:20 rule is the core concept behind the Pareto principle, which states that for many outcomes, roughly 80% of the consequences come from 20% of the causes. The Pareto chart is a graphical tool specifically designed to visualize this principle. It is a combination of a bar chart and a line graph, where bars represent individual causes in descending order of impact, and the line represents the cumulative percentage. This format allows practitioners to quickly identify the "vital few" causes that are responsible for the majority of the problems, thereby prioritizing improvement efforts effectively.

B. Simon's Cross-Functional Tool: This is not a recognized, standard tool within the ASQ Six Sigma Body of Knowledge and appears to be a distractor.
C. SIPOC: A SIPOC (Suppliers, Inputs, Process, Outputs, Customers) diagram is a high-level process mapping tool used to define a project's scope, not to prioritize causes.
D. Framing Tool: Framing refers to the way a problem is presented or defined. While important in problem-solving, it is a cognitive concept, not a specific data analysis tool.

1. Munro

R. A.

Ramu

G.

& Zrymiak

D. J. (2015). The Certified Six Sigma Green Belt Handbook (2nd ed.). ASQ Quality Press. In Chapter 13

the section on Pareto Charts states

"The Pareto chart is a graphical tool to map and grade business process problems from the most recurrent to the least frequent. This is the 80/20 rule..." (p. 169).

2. Montgomery

D. C. (2020). Introduction to Statistical Quality Control (9th ed.). John Wiley & Sons. Chapter 4

Section 4.8

"The Pareto Chart

" explains

"The Pareto chart...is based on the Pareto principle

which is often called the 80-20 rule... The Pareto chart is a very useful tool for identifying the most important problems..." (p. 171).

3. Murugesan

L.

& Rajendran

C. (2012). A systematic approach to identify and attack the root causes of 3-D (delivery

defects

and delivery-adherence) problems. International Journal of Production Research

50(17)

4765-4783. The paper describes the Pareto chart as a tool to "identify the vital few problems from the trivial many problems (the 80/20 rule)" (p. 4769). https://doi.org/10.1080/00207543.2011.616970

4. MIT OpenCourseWare. (2012). 16.660J Introduction to Lean Six Sigma Methods. Lecture 2: Define/Measure. Slide 38

titled "Pareto Chart

" explicitly links the tool to the "80/20 Rule" and its purpose to "Separate the 'vital few' from the 'trivial many'."