Need to Create a Fault Tree Diagram?

QI Macros has a Ready-Made Fault Tree Diagram Template for Excel!

Why it Matters: 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.)

Sample Fault Tree Diagram

fault tree diagram in Excel

Go deeper: Learn How to Create a Fault Tree Diagram.

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

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The Fault Tree diagram is one of many tools included in QI Macros add-in for Excel.

QI Macros adds a new tab to Excel's menu, making it easy to find any tool you need. If you can't locate a tool, use the find tools feature on the far right side of QI Macros menu.

find tools on QI Macros menu