A spaghetti diagram (sometimes called a physical process flow or a point-to-point workflow diagram) is a line-based representation of the continuous flow of some entity, such as a person, a product or a piece of information, as it goes through some process. The name comes from the resemblance of the final product to a bowl of cooked spaghetti.
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Spaghetti diagrams are often used in agile project management. Unlike spaghetti code, which is a derogatory term for unstructured language coding, the term spaghetti diagram carries no negative connotation.