How do I determine the root cause of a complaint?

The reason someone is complaining is the problem that caused them to have a bad experience. To figure out the reason, ask questions like “What happened?” “What were you trying to do when this occurred?” and “Who else was involved in the process?” You can also figure it out by looking at feedback, complaints, and other data. The goal is to find out what went wrong and fix it so it does not happen again.