Most companies use some form of flow chart,
fishbone chart, or check list at this point to help identify possible causes.
Appended are:
Fishbone Chart; Rate Your Words; Modeling a Think-Aloud.
One technique for analyzing problems that is popular in statistical process control is the
fishbone chart or Ishikawa diagram.(1) An example of a
fishbone chart for a problem with bubbles or voids in the extruded product is shown in Fig.
For example, a presenter, despite obvious pride in the achievement, shouldn't announce to a team: "Here is a
fishbone chart displaying the root cause of all the problems with the admission process, which took a long time to do.
Two charts I find most useful are: the
Fishbone Chart, and the Frequency Matrix.
The 22 tools/techniques are as follows: the activity network diagram; the affinity diagram; brainstorming; building consensus; building a glossary of terms; the cause-and-effect diagram; the column flow chart; the correlation chart; data displays; dot voting methods; the
fishbone chart; the Gantt chart; the interrelationship diagraph; the nominal group technique; the Pareto chart; the prioritization matrix; the process flow chart; process mapping; process task spreadsheets; the radar chart; the scatter diagram; and service mapping.
These range from bullet types--individual pieces, such as Ishakawa
fishbone charts, numerous models of ranking risks such as FMEA, and design of experiment (DoE) software--to combinations of the pieces.
Fishbone charts, or cause-and-effect diagrams, explore the root causes of a problem in diagrammatic form.
Often called
fishbone charts because they resemble the skeleton of a fish, they are designed to identify all of those factors that can have an effect on the process under analysis.
Some team members have also received training in technical skills such as calculus blueprint reading, problem-solving, and creating simple data documents such as
fishbone charts, Pareto charts, and histograms.
They should begin using quality improvement tools: flowcharts,
fishbone charts, and Pareto diagrams.
FISHBONE CHARTS (Cause & Effect Diagram) are procedures for the project group to graphically analyze a problem.
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