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Seven Basic Quality Improvement Ishikawa Tools | Important asset to control quality in your project [OverView]

Last updated on 04th Nov 2022, Artciles, Blog

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Rameshwar Singh (Senior Project Manager )

Rameshwar has 6+ years of experience as a senior project manager in SWOT. He is a specialist in decision tree diagrams, SWOT analyses, fishbone diagrams, Pareto charts, and fault tree analyses, excellent in MS Excel, database, PowerPoint, ACA, ERISA, COBRA, FMLA, ADA, SAP SF, and Excel Macros.

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    • In this article you will learn:
    • 1.What Is Ishikawa Diagram?
    • 2.Ishikawa’s seven basic tools of quality.
    • 3.Benefits .
    • 4.Drawbacks .
    • 5.Conclusion .

What Is Ishikawa Diagram?

An Ishikawa graph is the chart that shows a reasons for an occasion and is frequently utilized in an assembling and item advancement to layout the various strides in cycle exhibit where quality control issues may an emerge and figure out a which assets are needed at a explicit occasions.The Ishikawa graph was created by a Kaoru Ishikawa during 1960s as a method of an estimating quality control processes in a shipbuilding business.

Ishikawa’s seven basic tools of quality:

As a project manager believe all use of various tools and techniques to control a quality in a project. As a project manager should be aware of all the tools and techniques used.More project managers fail to control the quality in their project as they chose a wrong tools and techniques for their project. As a project manager should pick the correct tools for a quality control and for this need to know the basic attributes of all quality tools mainly Ishikawa’s seven basic tools of quality. Let explain these tools one by one:

Cause and effect diagram:

  • It is popularly known as a Fishbone diagram (as it looks like a fishbone) or sometimes known as an Ishikawa’s diagram. It is frequently used to find a root causes of the defects.
  • Whether main issues are from hardware or it is from a software. Whether the problem is from management or the problem is from skill set of a people. By analyzing these can get a root cause of the defects that’s why it is also known as a root cause analysis. If managing a long term project are should use this quality tool at utmost.

Pareto Chart:

  • 80% of problems are due to the 20% of the root causes. It is like a prioritizing the defects. Search for a main reason and try to reduce the maximum problems.
  • This is frequently used when are in hurry and have to reduce a defects… as a project manager should know by which factors are getting more problems and document it and try to find out the way to remove these defects as by removing a same defects are will be able to reduce maximum problems.
  • It is based on a Joseph Juran’s 80/20 principle. Pareto recommends that this tool can be a very useful if are getting more errors frequently. As a project manager and should detect an error which can resolve the maximum problems.
Ishikawa Diagram

Control Chart:

  • It is not possible to be standardize the sizes weights of a deliverables. Instead can decide an upper limit and lower limit of acceptance. That upper and lower control limit is decided by a project manager and other stakeholders.
  • If a variables are within the limit the project will be treated ‘in control’. There is a line in a middle of the control chart which is known as a ‘mean’. It represents a middle of the range of an acceptable variation. If seven a variables are found in one side of the mean it is known as a rule of seven and the project will be treated as a ‘out of control’. There is also a upper and lower specification limit which are decided by an end customers only.


  • It is the graphical representation showing visual impression of a distribution of data. It displays data in the form of a bars and columns. It shows what problems are in a project.

Run Chart:

  • It shows a trends of variations. If need to assess the variable are need to check a progress chart. Have to see the patterns of variations.


  • It shows how a systems or processes flow from beginning to end and how are they are related to each other. Through it can assess a particular process and analyse the potential quality problems. It is an important tool to be used in a so many project management activities.

Scatter Diagram:

It is like trying to trace a relation between the two variables. Like due to the one defect another defect is created maintaining a relationship. Apart from a above-mentioned tools there are some other tools available that can be used as quality tool like statistical sampling. It is frequently used when working on a bulk volume where time does not permit to cross check each and every deliverables. To save a money on a project and time consuming on your project picked randomly few deliverables and check a quality of those deliverables. If it is up to a mark the entire lot could be delivered.

Ishikawa’s seven basic tools of quality

Benefits :

  • The primary advantage of an utilizing the graph is the way that is the visual instrument, straightforward and simple to examine.
  • It impacts all the workers engaged with an interaction to focus on the outcomes to be an accomplished.
  • It assists with the observing the underlying driver of issue.
  • Can be utilized as measurable apparatus for a complete quality control.
  • It focuses on the examination in more detail, assisting with a settling on more compelling choices.
  • It has conventional use and adaptable design, being material in the issues of various qualities.

Drawbacks :

  • Regardless of incredible pertinence and effortlessness in a cause definition, the instrument has not a just sure focuses. Can refer a certain detriments.
  • It doesn’t flag a genuine gravity of the issue; Frequently exertion is a squandered in recognizing a reason for impacts that have no extraordinary significance.
  • Notwithstanding these are detriments it is an important to play it safe when creating and carrying out Ishikawa Diagram.
  • It ought to be utilized ideally by a representatives who as of now have some information about a PDCA cycle.
  • Since it is the moderately basic apparatus, it is important to have business structure good for this carry out.
  • Since they cover a various regions and an enormous number of an individuals, it is conceivable that can be exists various sentiments, being important to know how to be control them.

Conclusion :

The Ishikawa diagram also known as a fishbone diagram is a useful tool in project management particularly when it comes to a quality control. Conducting a proper risk analysis anticipating and solving a problems are an essential management skills to lead be a successful projects.

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