Root Cause Tree® Dictionary - Improving Root Cause Analysis
: A detailed guide containing yes/no questions for every node on the Root Cause Tree® to ensure consistent and evidence-based analysis. How the Root Cause Tree® Dictionary Works
The TapRooT® Root Cause Tree® Dictionary is an instructional guide used during root cause analysis (RCA). While the physical Root Cause Tree® is a visual checklist of potential problem areas, the dictionary provides the exact definitions and criteria for every single item on that tree. Why the Dictionary is Necessary
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Once the causal factors are identified, the investigator brings them to the Root Cause Tree®. The tree categorizes root causes into seven overarching branches: Human Performance Difficulties Procedures Training Management Systems Quality Communication The Role of the Root Cause Tree® Dictionary
[ INCIDENT / EXPOSURE ] │ ┌────────────────┴────────────────┐ ▼ ▼ [ Human Performance ] [ Equipment Difficulty ] │ │ ┌─────────┴─────────┐ ┌────────┴────────┐ ▼ ▼ ▼ ▼ [Categories] [Categories] [Categories] [Categories] - Procedures - Comm. - Design - Maintenance - Training - Ergonomics - Quality Control - Wear & Tear - Mgmt System - Work Env. 1. Human Performance Difficulty
: A digital format allows users to instantly search for keywords rather than flipping through a physical book. Root Cause Tree® Dictionary - Improving Root Cause
Two different investigators analyzing the same incident independently will arrive at the exact same root causes.
: Safety managers can easily reference specific dictionary pages when training new team members on RCA protocols.
The Root Cause Tree is a visual flowchart that guides investigators through various categories of potential failures. However, different investigators might interpret words like "procedures," "training," or "management systems" in vastly different ways. The Dictionary solves this problem by providing strict, standardized definitions. If an investigator answers "Yes" to a series of specific, objective questions in the Dictionary, they are directed down a precise path on the tree. This eliminates guesswork, bias, and finger-pointing. The Structure of the TapRooT® Root Cause Tree Why the Dictionary is Necessary I can provide
For each node, the Dictionary lists specific questions. If the answer is "Yes" based on your evidence, you continue down that path.
Participants receive the physical books, materials, and digital access as part of their course registration.
Do you currently use any other like 5 Whys or Fishbone diagrams?
The TapRooT® Dictionary explicitly prevents this by treating human error as a symptom , not a root cause. Example of the Dictionary in Action
A list of specific conditions that must be present to select a particular root cause.