July 15, 2009 | Mark Paradies

Accident Investigation Mystery: Washington Metro Root Causes Still Not Understood

See this article from CNN about the mystery surrounding the Washington Metro accident:


The article portrays the equipment troubleshooters as being fairly baffled by continued unreliability in the automatic control system. They seem to be in the “replace something and see if it works” mode.

Equipment troubleshooting, especially of advanced, digitized, complex systems, can be extremely difficult. That’s why pre-thought out troubleshooting tables are so important at the beginning of troubleshooting.

That’s why we licensed Heinz Bloch’s troubleshooting tables and added them to TapRooT® to create the Equifactor® Troubleshooting Tables back in 1998. Since then, we’ve added to the troubleshooting tables and even created a way for companies to develop their own custom tables for their own specialized equipment.

You can’t find the root causes of problems before you fully understand what happened. That’s why troubleshooting equipment problems is an important part of the root cause analysis of an accident that involves an equipment failure.

Would like to learn more about systematic equipment troubleshooting and Equifactor®? Attend a 3-Day TapRooT®/Equifactor® Equipment Troubleshooting and Root Cause Failure Analysis Course. For the upcoming public course schedule, see this link:


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