Fault Tree Diagram in Excel

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Fault Tree Diagrams

Fault Tree Diagrams take reliability block diagrams one step further by adding logic symbols (and/or) to connect the blocks. (Similar to root cause analysis.)

How to create a Fault Tree Diagram.

Taking a failure event that occurred, analyze that event (ask why?)
List failures, events, or conditions that had to exist to cause the failure.
Use logic symbols to connect the causes (e.g., this and that cause the failure.)

Here is a sample Fault Tree Diagram created using the QI Macros for Excel SPC software

Fault Tree Diagram

The Fault Tree Diagram Template is just one of the tools included in the QI Macros for Excel SPC Software for Excel.

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The QI Macros for Excel $139, is an inexpensive easy to use set of Excel add-ins for statistical process control and Lean Six Sigma. It draws line, pie, bar, pareto, box whisker, histogram (Cp, Cpk), scatter and control charts (with stability analysis).

It contains over 70 fill in the blank templates such as the Ishikawa diagram, QFD, DOE, FMEA, PPAP, and Gage R&R for MSA. Performs ANOVA, t-test, F-test, and regression analysis.

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