Le modèle INVEST est décrit sur Wikipedia
| Letter | Meaning | Description |
|---|---|---|
| I | Independent | The user story should be self contained, in a way that there is no inherent dependency on another user story. |
| N | Negotiable | User stories, up until they are part of a Sprint, can always be changed and rewritten. |
| V | Valuable | A user story must deliver value to the end user. |
| E | Estimable | You must always be able to estimate the size of a user story. |
| S | Sized appropriately or Small | User stories should not be so big as to become impossible to plan/task/prioritize with a certain level of certainty. |
| T | Testable | The user story or its related description must provide the necessary information to make test development possible. |
Et cette vidéo en décrit les grands principes.
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