December 2014
Intermediate to advanced
154 pages
3h 33m
English
Content preview from Root Cause Analysis
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88 • Root Cause Analysis
Key Points
• An interrelationship diagram graphically displays the relationship
between multiple factors.
• It is useful for the investigation of service failures when there may be
multiple inuence factors.
• It is easy to create using index cards or a ip chart.
EXAMPLE 11.4
Figure11.4 provides an interrelationship diagram for quality improvement.
PROCEDURE
Step 1: Write down potential casual factors. Be sure not to cluster the fac-
tors too closely together.
Step 2: Use arrows to show the directions of inuence between the poten-
tial causal factors.
Step 3: Observe the interrelationship diagram and draw conclusions
bas ...
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