Improving user stories with a Definition of Ready
By Nathan Donaldson in Agile on August 23, 2011
In Scrum, the definition of done tells us when a feature is completed to a releasable standard. It sits above the individual acceptance criteria for each user story (learn more about the differences between the definition of done and acceptance criteria). For example, here’s the definition of done for development stories from one of our projects:
- committed to source code repository
- passes appropriate tests for story (including cross-browser testing)
- tests written and run on integration server
- accepted by product owner on UAT (unless story asks otherwise)
- documented (well-commented)
- cross-browser testing of interface elements
- readme updated if applicable
- change log updated.
Adding the definition of ready to the definition of done
Recently, we’ve been looking at the definition of ready — the criteria a user story has to reach before it can be handed over to the team. You can think of the definition of ready and the definition of done as two key points in the sprint cycle — one defines when a story is ready to go in, and the other defines when a story is ready to come out.
Jeff Sutherland and Carsten Ruseng Jakobsen have described a definition of ready as a simple concept that depends on discipline and creates stability in a sprint. It’s designed to stop time being wasted when it’s discovered that user stories are missing important pieces of information that means they can’t be started or completed.
A definition of ready gives the team confidence that every story they bring into a sprint is completely ready for them to get started on. In this way, as Sutherland and Jakobsen observe, a definition of ready can improve the flow and stability in a sprint.
A sample definition of ready
Here’s a definition of ready we’ve developed for one of our projects:
- The business value is clearly articulated (in the format of ‘As a type of user I want some goal so that some reason‘).
- The story follows the INVEST model.
- The story has a 2 – 3 word short summary.
- The story is small enough to fit in one sprint.
- The story has clear and concise acceptance criteria which describe all of the features of the story. Details are captured as a narrative texts that describe an interaction of the user and the system, focusing on the value a user gains from the system.
- Once the acceptance criteria have been met the story is complete.
- No external dependencies block the story being completed.
- Story identifies external expertise and provides contact details.
Many of the points (for example, 2,4 and 5) reinforce the usual expectations of a good user story. Some are designed to trouble-shoot in advance. For example, 7 and 8 are there to help the team work as efficiently as possible, by ensuring they’re not being held up by business processes outside of the team, and have ready access to any expert help they need. And some are small tweaks that add efficiency in the longer term – for example, point 3 ensures we have a short headings for the user stories that make them easy to scan in Pivotal Tracker.
Of course, having a definition of ready doesn’t mean there won’t be occasions during sprint planning meetings when gaps are found in the preparation or understanding of a user story. It also doesn’t mean the team no longer has to talk the stories through with the product owner during these meetings, and throughout the sprint. But it does mean you’re creating the best possible conditions for optimal productivity in the sprint.
Introduction to user stories — blog series
- Beginner’s guide to user stories
- Adding acceptance criteria to user stories
- User stories and the development process
- use cases vs user stories
- Bringing stakeholders on board through user stories
- Creating user stories with story mapping
- Improving user stories with a definition of ready
- Going from Good to Great with Scrum presentation PDF by Jeff Sutherland and Carsten Ruseng Jakobsen
- Definition of ready by Ken Power
- The definition of ready by Roman Pichler