Prior to Agile coming into existence, I was fortunate to learn how to write requirements by Elemer Magaziner (i.e., business requirements) and Alistair Cockburn (i.e., use cases). They provided various alternatives to writing clear requirements that were irrespective of methodology.
From this I learned that there is a strong benefit to establish what I term as the “requirements language construct”. This construct helps you consistently document your requirements focusing on key requirements elements. One common requirements language construct in the Agile world is the canonical form. It is important to realize that elements of the canonical form have been around for years. With that being said, the three basic elements of the canonical form provide a good framework for establishing requirements.
First I will discuss the user story that is typically expressed within the three-part canonical form. Then I will introduce the enhancement of a requirements language construct that can adapt the canonical form. The language construct for a user story in canonical form looks like this:
Personas – Do you really know your Users? The following are examples of user stories in canonical form:
- As a learner (persona), I want to set up my profile to include my photo (action), so that my distributed team members know what I look like (business value).
- As a prospective buyer (persona), I want to search on homes (action) so that I know what properties are available in my price range (business value).
As enhancements to this construct, you may consider adding the system that will be used or interacted with and the receiving entity which identified the expected output from the requirements. If applying these, the requirements language construct would look something like this:
As a (persona)
I want (action) from (system) to the (receiving entity)
so that (business value)
The following are examples of user stories with these enhancements. The first example below takes the second example from above and enhances it with the system and receiving entity.
- As a prospective buyer (persona), I want to search on homes (action) from MLS (system) to a separate window (receiving entity) so that I know what properties are available in my price range (business value).
- As a quant analyst (persona), I want a derivatives report (action) from the asset management application (system) in the form of a pdf (receiving entity), so that I can distribute it to my fund managers (business value).
There is no “right” requirements language construct. It is important to craft one and then experiment with it. I would suggest starting with the canonical form and work from there.
Finally, the Product Owner, Business Analyst, Product Manager, and anyone who writes requirements should be trained in writing user stories in whatever form is used to articulate requirements. The Agile Team should be educated in understanding what to look for in a user story and asking questions regarding the elements of the canonical form. You may also want to train stakeholders and customers on how to provide their needs in your requirements language construct for consistency and clarity.
To read more about establishing an Agile Lagging to Leading Metric Path and Agile Measures of Success, consider reading Chapter 18 of Being Agile.