To determine where feeding buffers are necessary, first allocate user stories among teams and iterations. Then look for critical dependencies between iterations and teams. Finally, add a feeding buffer only between these critical dependencies. That is, add a feeding buffer only if a team will be unable to do planned, high-priority work without the deliverables of another team. Even so, if the team can easily swap in other highly valuable work, a feeding buffer is unnecessary. Similarly, do not add a feeding buffer if the second team will be able to start making progress with a partial
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