When a senior engineer at your organization is working on a customer ticket and has determined what he feels is the cause of the problem, which step did he ignore?
Know that he stumbles upon a feasible answer while researching the resolution, instantly applies it, and closes the issue. However, it looks that he skipped a crucial stage in the troubleshooting process.
Following the development of an action plan and the implementation of a solution, the next stage is to confirm that the solution worked. You may also wish to take precautionary actions to ensure that the problem does not recur in the future.