In the world of mission-critical networks, the very idea that you may be ‘playing a hunch’ when it comes to investigating a service-affecting issue likely would be met with utter derision. The pressure is to provide confident answers to critical questions; what happened, who was affected and how long will it take to resolve. This can be daunting especially when the air is thick with accusations and the ‘interested parties’ trending towards ‘C-level’ can be insurmountable.
Of course, the truth is that playing educated hunches lies at the very heart of network troubleshooting. It is only after following and discarding a number of possibilities that you can exonerate yourself in what is known as the mean-time-to-innocence.