Law Of the MinimumIshikawa diagram

[dimpy.handa]

Ishikawa Diagram The figure below shows an Ishikawa diagram. Note that this tool is referred to by several different names: Ishikawa diagram, Cause and Effect diagram, Fishbone and Root Cause Analysis. These names all refer to the same tool. The first name is after the inventor of the tool - K. Ishikawa (1969) who first used the technique in the 1960s. Cause and Effect also aptly describes the tool, since the tool is used to capture the causes of a particular effect and the relationships between cause and effect. The term fishbone is used to describe the look of the diagram on paper. The basic use of the tool is to find root causes of problems; hence, this last name.

 

[gala01]

hey dimpy,, try and explain the complete diagram. you have an ample knowledge but all went out of my head, , you should have post this on the articles section. dont take it as offence. just my view.

 

[dimpy.handa]

The basic concept in the fishbone diagram is that the name of a basic problem is entered at the right of the diagram at the end of the main 'bone.' This is the problem of interest. At an angle to this main bone are located typically three to six sub-bones which are the contributing general causes to the problem under consideration. Associated with each of the sub-bones are the causes which are responsible for the problem designated. This subdivision into ever increasing specificity continues as long as the problem areas can be further subdivided. The practical maximum depth of this tree is usually about four or five levels. When the fishbone is complete, one has a rather complete picture of all the possibilities about what could be the root cause for the designated problem.

 

[swatiraohnlu]

To construct a fishbone, start with stating the problem in the form of a question, such as 'Why is the help desk's abandon rate so high?' Framing it as a 'why' question will help in brainstorming, as each root cause idea should answer the question. The team should agree on the statement of the problem and then place this question in a box at the 'head' of the fishbone.

The rest of the fishbone then consists of one line drawn across the page, attached to the problem statement, and several lines, or 'bones,' coming out vertically from the main line. These branches are labeled with different categories. The categories you use are up to you to decide.