In Figure 1, the vision describes the ultimate reason for creating the product, the product strategy states how the vision will be realized, and the product roadmap states how the strategy will be implemented. The product backlog contains the details necessary to develop the product as outlined in the roadmap, such as epics, user stories, and other requirements. Note that the relationships between the elements in Figure 1 work in both directions: the product backlog can cause changes to the roadmap, for instance, which in turn may affect the strategy. For example, if the feedback from the
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