Question

My question it is about (Fish-bone) analysis :

Please choose any problem then use (fish-bone) analysis to find out about the causes that made the problem , then determine the causes ,primary causes and secondary causes and the solution.

dont forget to write the solution..

Writes it as a text

the problem and the causers then draw diagram.

Thanks

Answer 1

Ishikawa published Cause and Effect Analysis in his book ‘Introduction to Quality Control’ in 1990. The fishbone diagram is one of seven quality control tool.

The diagram helps to analyze through various list of causes to find the problem.

The main steps of cause and defect analysis are:

1. Problem identification

2. Assessing the major factors related to the problem

3. Identification of possible causes

4. Analyzing the diagram

1. Problem identification

Write down the problem. Assess who is involved, how, when and where it occurs.

On the right hand side, write the problem inside a box and draw a horizontal line across. The resulting diagram looks like head and long spine of a fish.

Example: The problem chosen for fishbone analysis is about the manager whose problem is an uncooperative branch office.

2. Assessing the major factors related to the problem

Identify the factors related to the problem. These can be equipment, systems, external forces, people, materials etc.

In a diagram, draw a line off the spine for each factor and label each line.

Example: The manager identifies and list these factors like site, task, people, equipment and control.

3. Identification of possible causes

Brainstorm the factors considered in step 2. individually for possible causes of the problem.

In the diagram, show the possible causes as shorter line coming off the bones. Large or complex causes are broken down into sub – causes and these lines come off each cause line.

Example: The manager identifies the possible cause of the problem from the factor listed in step 2 and add these to his diagram as shown in figure 3.

The possible cause of the problem identified from 1st factor that is site are reasonably pleasant building, spacious offices and run down area. The run down area are further broken into crime, feeling of cheapness and depression sub – causes.

The possible cause of the problem identified from 2nd factor that is equipment are reasonably modern, e – mail down for a while causes. The e – mail down for a while cause is broken into successful e – mail updates questioning sub – causes.

The possible cause of the problem identified from 3rd factor that is task are results and sales. The result is broken into mainly good result sub – cause. The sales is broken into depressed area and which further into questioning about happiness, comparison with other office areas and frustration sub – causes.

The possible cause of the problem identified from 4th factor that is control are missing of last branch manager meeting by Jane and prevention of contact due to urgent job. The first cause is broken into understanding of sales strategies questioning sub – cause.

The possible cause of the problem identified from 5th factor that is people are John, Mark, Jane and Sally. John is broken into prickly and productive sub – causes. Mark is broken into capable when supervised and unmotivated sub – causes. Jane is broken into efficient and optimistic sub – cause. Sally is broken into just does the job sub – cause.

4. Analyzing the diagram

The most likely cause of the problem are further investigated through investigations, surveys etc. and found out.

Example: The manager finishes up his analysis. Without this analysis, he would have assumed the people in the branch office were difficult to work with.

For him, the best approach now is to arrange a meeting with his branch manager. He fully brief the manager with the new strategy and talk about his problem.