The Troubleshooter's Creed
The Troubleshooter's Creed
1. Understand the Sequence of Operation - If you don't know first how a system should be working you will have a very hard time figuring out why it isn't.
2. What was the last thing you did before the failure.
3. Fix the problem you know about - If you know part A is bad but it seems like part B is also a likely culprit, replace part A first and test. Similar to item 5 below, it's usually the problem you know about.
4. Assume Nothing, Verify Everything - The description of the problem can be a help but is often wrong. Check all the information you have been given for yourself.
5. Rely on All of Your Senses - You can often hear, smell, or feel something that you would have otherwise missed.
6. Start with the Most Obvious - The most obvious cause of a problem is usually the right one. Don't start looking for complex solutions until the simplest ones have been eliminated.
7. Divide the System in Half - Large or complex mechanical and electrical systems can usually be separated into smaller parts and each part operated independently. You can then divide the non-working part of the system again and again until the cause of the problem is isolated.
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