Seven QC tools

Check sheets are tools for collecting data. They are designed specifically to the type of data to be collected. Check sheets aid in the systematic collection of data. Some examples…

Histograms or Frequency Distribution Diagrams are bar charts showing the distribution pattern of observations grouped inconvenient class intervals and arranged in order of magnitude. Histograms are useful in studying patterns…

Pareto Diagram is a tool that arranges items in the order of the magnitude of their contribution, thereby identifying a few items exerting maximum influence. This tool is used in…

A Cause-and-Effect Diagram(Fishbone diagram) is a tool that shows the systematic relationship between a result or a symptom or an effect and its possible causes. It is an effective tool…

When solving a problem or analysing a situation one needs to know the relationship between two variables. A relationship may or may not exist between two variables. If a relationship…

A flowchart is a type of diagram that represents a workflow or process. A flowchart can also be defined as a diagrammatic representation of an algorithm, a step-by-step approach to…

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Control charts was developed by Dr Walter A. Shewhart during the 1920s while he was with Bell Telephone Laboratories. These charts separate assignable causes. Control chart makes possible the diagnosis…