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Have you used Ishikawa diagram?
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How often you conduct facilitation to solve problems and which is the most technique have you used ? please give an example
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Hi Riyadh,
Ishikawa diagrams are used when the theam is looking for a root cause. Usually it is used when the problem is not well known. It is an organized way of thinking (5M : Manpower,Machinery, Material, Measurement and Method) - we list all the factors (in these 5 categories) that could be the cause of the problem. Then we choose the factors that we want to work on and perform a design of experiment (DoE). This is done in order to determine which factors are the most influential and after that we can do an optimization of those factors. But for problem solving you can use other tools such as Pareto , control charts , scatter diagrams, histograms ... depending on the problem.
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I have used it occasionally. It is a good way to map cause and effect. For those of us who love using the right side of the brain, it's a great way to conceptualize all findings in one diagram.
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Nenad, Thanks for your input as Sante mentioned cause & effect, we all know the other name might call it fishbone diagram most of other techniques you mentioned are from the 7QC but not all of them can be helpful in solving problems for example scatter diagram can not be applied to solve MVR issues (Mechanical Vapor Recompression evaporators) you would struggle with the variable and constant In general Identifying the issues and brainstorm possible solution,evaluating all options and select best agreed option, document all session, contingencies then act, monitor and re evaluate
In many other cases Affinity Diagram or decision tree would be useful if you can combine mathematical values to calculate EMV.
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Riyadh -

I've used it regularly to either kick-start a brainstorming process using the M's or P's (depending on whether it is manufacturing or services) or to affinity group a brainstormed set of potential causes.

As such, it is usable in either a process improvement (e.g. LSS) initiative or a project.

Kiron
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Thanks Kiron
Yes it is also helpful in lean six sigma.
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Using the cause-effect technique and the 5 why, are very powerful analytical tools to find the root cause of the problems
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I think it's good tool to help identify the root causes from all the ideas generated. Sometimes this can be used for voting, so each team member identify the top three root causes and then put sticky dots on the Ishikawa diagram next to what they believe are the root causes.
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Using ishikawa is very useful however I found that many problems come from the commuincation channels and the disconnection between management and staff.. What is big thing for management you solve it by listening to first line staff. You will be surprised if you listen to the staff how easy ishikawa implementation will be.
They know the route of the problem very well.
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I have used them occasionally, although often the root cause of the observed event is so obvious that the Ishikawa is not needed. As someone already mentioned earlier, Pareto, 5 why's, or FMEA are preferred over Ishikawa.
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I have used it occasionally to outline Root Cause Analysis (RCA) of Non-conformance process in Quality Management System auditing ISO 9001: 2008. It is also helpful in the practice of failure analysis in engineering and maintenance.
Therefore, the analysis of Ishikawa was created to examine all possible causes of poor quality of the product; to identify the causes that really contribute to poor quality; to apply corrective actions.

To change an effect it is necessary to act upon its causes.
Example:
- If a product is being rejected, certainly occurred something that caused this poor product quality, at some stage in the production process.
- It is also used to observe the causes of a good result or effect. If these causes are known, this positive result could be replicated in other occasions.?
The Ishikawa Diagram is a good way to show how they are related to the causes and the effect.
The main causes which cause particular effect may be distributed in different categories, which serve to classify the primary causes and are represented by: Machines (Equipment), People (Manpower), Materials and Methods (Process). They are also used more categories, such as the Measurement, Environment, Finance and Management, according to the situation, or according to the nature of the problem under study.
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