The Independent Service Heuristics (ISH) are rules-of-thumb (clues) for identifying candidate value streams and domain boundaries by seeing if they could be run as a separate SaaS/cloud product. The ISH approach is a “rapid results” approach, and complementary to the approaches from Domain-driven Design (DDD). In particular, ISH is very suitable for conversations with people without an engineering or software background, enabling important discussion and alignment across organisational boundaries.
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