The INVEST model, originally created by Bill Wake, is the industry-standard checklist used by Guidewire Business Analysts to assess the quality of a User Story.
Independent: The story should be self-contained, allowing it to be developed and tested separately from other stories to avoid dependencies that block progress.
Negotiable: The story is not a closed contract; it is an invitation to a conversation (Story Huddle) where details can be adjusted between the BA, Developer, and QA.
Valuable: It must deliver value to the business or the user (not just a technical task).
Estimable: The team must have enough information to size the effort. If it cannot be estimated, it usually needs further clarification or breakdown.
Small: It should be small enough to be completed within a single sprint (typically 2-3 days of work).
Testable: It must have clear acceptance criteria (often in Given-When-Then format) that allow the QA team to verify when the story is "Done."
Why other options are incorrect:
B, C, D: These contain incorrect terms such as "Viable," "Elaborate," "Software," "Technology," or "Investigate," which are not part of the standard INVEST acronym.
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