When a new person joins the team, WIP limits may need to be adjusted. Ideally, that person is assigned to the slowest step (increasing its throughput). If so, simply work through the process described in “Step 3: Set limits on chaos” again. If the new person is assigned to a different step, she is going to have free time or her peers will. That time can be used wisely by helping with other projects. Remember, you can’t go faster than your slowest step.