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The first thing we have to do is to look ahead two to three sprints to understand which product backlog items are likely to be worked on (Cohn 2005, 206; Pichler 2008, 146). This requires decomposing and refining product backlog items earlier; more detailed items can now be found at the top of the product backlog. The next step is to identify any dependencies between the teams by asking the following questions: Do they have to work on the same feature or component? Does any team act as the supplier of another team? If so, is it feasible to supply the feature or component and use it in the same sprint? To eliminate problematic dependencies, we may have to change the product backlog prioritization.
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Roman Pichler (Agile Product Management with Scrum: Creating Products that Customers Love (Addison-Wesley Signature Series (Cohn)))