Several roles are defined in Scrum; these are divided into two groups; pigs and chickens, based on a joke about a pig and a chicken.

A pig and a chicken are walking down a road. The chicken looks at the pig and says, "Hey, why don't we open a restaurant?" The pig looks back at the chicken and says, "Good idea, what do you want to call it?" The chicken thinks about it and says, "Why don't we call it 'Ham and Eggs'?" "I don't think so," says the pig, "I'd be committed but you'd only be involved."

There are very few roles required in Scrum: Team, Scrum Master and Product Owner. In this section, we will provide detailed information about what makes an ideal team in Scrum, and define the two new roles (Scrum Master and Product Owner) introduced in Scrum that must be fully understood by organizations. Although people in organizations have actual job titles, these must be left at the door as soon as the Sprint process begins.