Requirement (noun.)

Definition: Something that's needed or wanted.

Also referenced as: Requirements (noun)

Related to: Agreement, Choreograph, Condition, Dependency, Object, Stakeholder, System, User



The word requirement was used 8 times across 3 pages


Chapter 4: Choose a Direction | Page 80

When you combine nouns with appropriate verbs, the resulting sentences can be referred to as requirements for what you're making.

From the previous example:

  • An author can write a post.
  • An author can delete a post.
  • Any user can share a post.
  • Any user can read a post.

This list of requirements defines the ideal solution. Each requirement tells us who should be able to do what in the eventual state.

When you take the time to make requirements concrete and prioritize them, you can better understand what you're actually making.

If you're designing an interface that prioritizes reading, it will be fundamentally different than an interface that prioritizes writing, even with the exact same list of requirements.



Chapter 4: Choose a Direction | Page 81

When we talk about what something has to do, we sometimes answer with options of what it could do or opinions of what it should do.

A strong requirement describes the results you want without outlining how to get there.

A weak requirement might be written as: "A user is able to easily publish an article with one click of a button." This simple sentence implies the interaction (one click), the interface (a button), and introduces an ambiguous measurement of quality (easily).

When we introduce implications and ambiguity into the process, we can unknowingly lock ourselves into decisions we don't mean to make.

As an example, I once had a client ask for a "homepage made of buttons, not just text." He had no idea that, to a web designer, a button is the way a user submits a form online. To my client, the word button meant he could change the content over time as his business changes.



Chapter 4: Choose a Direction | Page 85

Are you facing a mess like Rasheed's? Do your stakeholders speak the same language? Do you collectively speak the same language as your users? What language might be troublesome in the context of what you are doing? What concepts need to be better understood or defined?

To control your vocabulary: