Agile Scientist and Software Developer
Slicing stories means decomposing stories into smaller stories and ensuring that the smaller stories continue to deliver value - end user value. Like slicing bread, no matter how thickly or thinly I slice it, I should still be able to make a sandwich.
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An Epic is a User Story that is too big to be completed in a sprint and must be decomposed into smaller stories before it can be committed to a sprint.
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Scrum Boards display and track the work in an ongoing sprint. They support a quick visual indication of how much work has been completed, what is in progress and what work is waiting.
Photo by Amélie Mourichon on Unsplash
I believe Agile Iteration is about validating assumptions and optimizing to meet business goals.