IT Troubleshooting Method Frameworks

There are many ways to troubleshoot IT/network issues. Here are some of the tried and true methods that will help you apply a structured approach to getting to the root cause of an issue:

 

• Cisco Internetwork Troubleshooting Method - utilizes the OSI Model to help isolate the source of the issue
• Medical Practioners SOAP note - an acronym for the subjective, objective, assessment, and plan diagnostic technique

Jonathan Feldman, author of "Sams Teach Yourself Network Troubleshooting in 24 hours", also adds some additional methods under what he calls "Black Box Troubleshooting":

• The Delta Method: Identifying Network Change
• The Napoleon Method: Divide and Conquer
• The Sesame Street Method: Using What Works
• The Simple Simon Method: Consultations and Support.

I can't recommend this book enough for new IT professionals and even us veterans. While there is some good reference material on the internet about this subject, Jonathan's book is the best spend for your money and time. While some of the sections are dated due to the publication date of the book, about 80% of the information is still totally applicable as it is based on principles and not products.

I'll discuss the Troubleshooting Frameworks in future blog posts, but while you are waiting... go buy Jonathan's book and start reading. :)