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Based on public descriptions, the Tree organizes root causes into major categories:
The Dictionary assigns each cause a unique alphanumeric code (e.g., H1, P4) with a short title and detailed description.
The Tree is a picture. The Dictionary is the instruction manual.
Each node on the Root Cause Tree® corresponds to a specific definition, set of examples, and pre-written corrective action guides inside the Dictionary. Without the Dictionary, the Tree is just boxes and arrows.
Even with the dictionary in hand, new investigators make three critical errors:
While the specific PDF is a paid resource (usually included when taking a TapRooT® course or buying the book TapRooT: Changing the Way the World Sololves Problems), the power lies in the discipline of the definitions. If you strictly define your categories before you start investigating, you are applying the same "good piece" of logic that the dictionary provides.
TapRooT® Root Cause Tree® Dictionary is a proprietary resource owned by System Improvements, Inc. while the physical tree and its accompanying dictionary are generally restricted to licensed users or training attendees, you can find several legitimate public and community-shared PDF versions for educational use: TapRooT® Root Cause Analysis Free PDF Resources Internet Archive : A full digital copy of the TapRooT: root cause tree dictionary is available for free borrowing and streaming. System Improvements (Official Guide) : A high-level PDF guide on using the TapRooT system covers the methodology and the role of the Root Cause Tree. Scribd Community Documents : Various users have uploaded TapRooT Methodology Overviews Root Cause Tree tutorials that provide insight into how the dictionary is structured. Academic & Safety Repositories overview of the Root Cause Tree methodology is hosted on Academia.edu. detailed application guide
from the Flight Safety Foundation demonstrates how the dictionary's definitions are applied in real-world investigations. TapRooT® Root Cause Analysis Key Components of the Dictionary
The dictionary acts as a set of standardized questions to guide investigators through the Root Cause Tree®
The TapRooT® Root Cause Tree® Dictionary is a proprietary investigative tool designed by System Improvements, Inc. to help investigators consistently identify root causes by using a structured set of questions. Accessing the Dictionary PDF
Because TapRooT® is a protected, copyrighted system, a "free" version of the full, current dictionary is not typically available through official channels without purchasing training or software. However, you can find reference materials and versions via the following sources: taproot root cause tree dictionary pdf free
Internet Archive: An older version of the TapRooT® Root Cause Tree® Dictionary is available for free borrowing or digital viewing.
Academia.edu & Scribd: Community-uploaded PDFs and methodology overviews often contain significant portions of the dictionary's definitions and logic.
Official White Papers: System Improvements offers a white paper on the TapRooT® process that explains how the Root Cause Tree® and Dictionary work together to identify causal factors. Key Features of the Dictionary
The dictionary acts as the "instruction manual" for the Root Cause Tree®, ensuring that different investigators reach the same conclusions.
Question-Based Analysis: It provides specific questions for each category (e.g., Procedures, Training, Management System) to guide the investigator.
Consistency: It removes investigator bias by providing a common language and standardized definitions for root causes.
Software Integration: In the TapRooT® VI Software, the dictionary is built-in as an interactive feature where users can hover over items to see definition notes. Related Professional Guides
If you are looking for general Root Cause Analysis (RCA) best practices rather than the specific TapRooT® proprietary content, these resources are available: Software - TapRooT® Root Cause Analysis
TapRooT® Root Cause Tree Dictionary is an essential guide for investigators to accurately identify why human errors or equipment failures occur. While the full, current version is a copyrighted commercial product, you can access older editions and foundational white papers for free online. Essential Resources & Free PDF Access Archived Editions : An older version of the TapRooT® Root Cause Tree Dictionary
is available for free borrowing and digital browsing via the Internet Archive Methodology Overview Using TapRooT® Root Cause Analysis White Paper System Improvements, Inc. What the Taproot Root Cause Tree and its Dictionary are
provides a free 12-page breakdown of how the system identifies root causes for both minor and major accidents. Quick Reference Guides : Sites like Acadia.edu host community-uploaded PDFs that outline the Root Cause Tree methodology
and the 15-question Human Performance Troubleshooting Guide. How the Dictionary Works
The dictionary acts as the "expert system" that removes investigator bias. It provides a standardized set of Yes/No questions for every node on the Root Cause Tree.
Root Cause Tree® Dictionary - Improving Root Cause Analysis
The TapRooT® Root Cause Tree® Dictionary is a proprietary expert system used to identify root causes of human error and equipment failures through a structured set of yes/no questions.
While the full official dictionary is a copyrighted commercial product usually provided through paid training or software, you can find official white papers and community-shared copies online. Official White Papers & Guides
These documents provide high-quality overviews of the methodology and tree structure:
Using TapRooT® RCA to Investigate Incidents: An official white paper describing how to use the system to find root causes in industrial settings.
Example Application of TapRooT®: A technical paper from the Flight Safety Foundation detailing how the Root Cause Tree® and Dictionary are integrated into investigations.
TapRooT® Investigation Example: A detailed report showing the progression from evidence (SnapCharT®) to specific root causes. Shared Educational Resources set of examples
You can find full or partial versions of the methodology and dictionary on academic and archival platforms:
Internet Archive (1999 Edition): A digital copy of the 1999 dictionary available for borrowing.
Academia.edu Methodology PDF: An outline of the Root Cause Tree® methodology and its primary categories.
Scribd - TapRooT Root Cause Tree: A 2-page visual representation and description of the tree. Core Components of the Dictionary
The dictionary guides investigators through Basic Cause Categories, including:
Human Engineering: Evaluates fatigue, distractions, and interface design.
Training: Looks at whether knowledge was available or if the training itself was deficient.
Management Systems: Investigates policies, standard operating procedures, and oversight.
Procedures: Checks if procedures were followed, available, or technically accurate.
