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7 Basic Quality Tools - Coggle Diagram
7 Basic Quality Tools
Cause & Effect Diagram
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CHARACTERISTICS:
1) Effect of a problem located at the head of the fish.
2) Causes and sub-causes formed the body of the fish. Main Causes as the ribs, using 4M method while sub-causes attached to the ribs.
OUTCOMES:
1) The causes and sub-causes of the problems which influences the result of work.
2) To identify most likely cause
Check Sheet
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CHARACTERISTICS:
1) Shaped like a tally sheets.
2) Types of check sheet :
▪️Recording Check Sheets
▪️Inspection Check Sheets
OUTCOMES:
1) Main Defects that occurs.
2) Main causes of defects.
3) To ensure all essentials are available during a process.
4) To ensure all inspections and verification are checked out.
Control Chart
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CHARACTERISTICS:
1) 2 types:
▪️Attribute SPC which based on 2 conditions.
▪️Variable SPC to control variation of a process
2) Contain average, control limit, upper control limit and lower control limit.
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Histogram
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CHARACTERISTICS:
1) shaped like bar graph, presented by columns.
2) The columns vary in height depends on frequency of the data.
OUTCOMES:
1) Detailed profile of a data, can show mode of the data.
2) Visually strong data interpretation.
3) Comparable to normal curve.
Pareto Chart
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CHARACTERISTICS:
1) Similar to Bar chart but in more ordered way.
2) Consist of percentage to point out 80% of the main problem to prioritise.
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Process Map
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CHARACTERISTICS:
1) Flow chart with different shapes that represents different purposes.
2) In sequencing manners and can be color-coded.
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Scatter Plot
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CHARACTERISTICS:
1) Illustratate and validate hunches.
2) To explore the cause and effect relationship.
3) To conclude positive and negative of a relationship.
OUTCOME:
1) Possible correlation between the variables.
2) To differentiate data and the result.
3) Can identify root cause easily.