Question

How many stages did the fishbone explain?​

Answer 1

Answer:

Fishbone Diagram: The 6 Ms

These 6 Ms influence variation in all processes and serve as the first six main “bones” of your fishbone. Let's take a look at how the 6 Ms are defined and how they can contribute to process variation.

Answer 2

Answer:

type keyword(s) here

Print

Fishbone Diagram: Determining Cause and Effect

Jonathan Trout, Noria Corporation

Fishbone Diagram

What is a Fishbone Diagram?

A fishbone diagram is a cause-and-effect discovery tool that helps figure out the reason(s) for defects, variations or failures within a process. In other words, it helps break down, in successive layers, root causes that potentially contribute to an effect. Sometimes called an Ishikawa diagram or cause-and-effect analysis, a fishbone diagram is one of the main tools used in a root cause analysis.

A fishbone diagram, as the name suggests, mimics a fish skeleton. The underlying problem is placed as the fish’s head (facing right) and the causes extend to the left as the bones of the skeleton; the ribs branch off the back and denote major causes, while sub-branches branch off of the causes and denote root causes. These causes mimic the bones of the fish skeleton. The construction of the fishbone can branch off to as many levels as is needed to determine the causes of the underlying problem.

The concept of the fishbone diagram is said to have been around since the 1920s, but it was popularized by Japanese professor of engineering, Kaoru Ishikawa, who, most notably, put into place the quality management processes for the Kawasaki shipyards. One of the more famous uses of the fishbone diagram wasn’t used to find causes of existing problems, but rather in the design phase to prevent problems. Mazda Motors used fishbones diagrams to design the Miata (MX5) sports car. Details down to the design of the car’s doors, so drivers could rest their arm on it while driving, were considered.

In nearly any industry or business, variation is quality’s and efficiency’s kryptonite. Once an order has been placed, a predictable and standardized process should be followed through to delivery. Variation in that process usually means variation in the final product.

Fishbone diagrams are a great tool to either determine potential variables in a process to mitigate defects or failures, or to figure out what’s causing a defect or failure that is currently occurring.