write in different words this post: The Beer Game is a role-playing simulation game that lets participants experience typical coordination problems of (traditional) supply chains, where communication only happens between neighbors. The game involves four players: a beer retailer, wholesaler, distributor, and factory. Each player must manage their inventory and backorders while trying to minimize costs. The game is a demonstration of system dynamics in which a change at one point in the supply chain can have significant effects on other points in the chain