Many teams today have specific “go-to” people on a team. There is often a person who is the only one who has dealt with a specific feature or issue, and they are always the one that the team turns to when work needs to be done. What happens if that person is unavailable or busy with something else? Is the team sharing knowledge, or are they using the specialist’s capability as a crutch? Should someone be allowed to continue as the single point of failure?