A Scrum Team has technical specialists in addition to Developers. They perform their work when the Sprint Backlog needs their special skills, but they are idle otherwise. a) Continue to have specialists deliver fully integrated Increments. Gradually facilitate the team to organize their work to fully leverage these specialty skills. If required, they can enhance everyone’s domain of expertise, so that everyone is productive without idle time. b) Let the Project Manager coordinate their staffing needs and plan partial allocations to avoid idle time. c) Defer and accumulate the special work to later Sprints until it needs full-time specialists. Add them to the team for that time frame alone. Prior to that, deliver the Increment with stubbing.