Excellent post Isabella,
I think documenting the problem & solution are both very valuable parts of troubleshooting. As you stated many issues that arise when troubleshooting and fixing an issue. But proper documentations of the issue makes it so if the issue arises again there is recorded procedure on how to resolve that issue whether you see it or another colleague a thousand miles away, and we all know that most devices like cars have specific manufacturing defects that are common to the make or model.