If John stays on as supervisor, what are the immediate steps Alan and John must take with other people affected by John’s outburst?

John is a food server at the Lakeside Inn, a 200-room hotel with a coffee shop and a full-service restaurant called Hummingbirds. Two years ago, John started out as a busperson in the coffee shop, but because of his outstanding performance he was quickly transferred to Hummingbirds and made a food server.
John’s excellent record continued in his new position. John was always on time, was great with the customers, and was a real team player. When the buspersons fell behind, he helped them catch up without being asked. When another server needed help, John was always willing to take on tables in addition to his own. He even got along with the cooks. Within weeks at his new position, he knew everyone’s name and was usually the center of attention in the employee breakroom.
As time went by, he won employee of the month so many times it became somewhat embarrassing.