Troubleshooting Methodology (CompTIA A 220 902) - benjamin-s-hobbs/reading-notes GitHub Wiki
From https://www.professormesser.com/free-a-plus-training/220-902/how-to-troubleshoot/ (accessed Apr 26, 2023)
Identify The Problem
You need to understand what the problem might be
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Understanding is necessary to provide possible solutions (what could have caused the issue?)
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Can you duplicate the issue? this is a best practice.
-Ask a lot of questions. (Is the issue localized or widespread? Question more users to find out.)
-Break problems into smaller pieces to make them easier to handle.
Gather as much information as you can
Establish A Theory
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Occam's Razor - "The simplest answer is usually the correct one"
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However, consider all possible issues (make a list)
Test The Theory
Begin testing theories
Evaluate The Results: Is It Working?
Establish A Plan of Action
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Make a Plan to Implement your fix (always consider your stakeholders)
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Have a Plan B (consider your stakeholders)
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Consider a third plan, just in case...even if it's just to roll your changes back
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Does your plan have the proper green lights and approvals?
Implement The Plan
Verify Full System Functionality
Document Findings
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Make sure to document your findings and your fix so you don't need to re-invent the wheel for next time.
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Make sure people know where to find your documentation.