Definition: Act in such a way as to have an effect on another.
Also referenced as: Interaction (noun) Interacting (verb)
The word interact was used 6 times across 6 pages
User is another word for a person. But when we use that word to describe someone else, we're likely implying that they're using the thing we're making. It could be a website, a product or service, a grocery store, a museum exhibit, or anything else people interact with.
We're full of contradictions. We're known to exhibit strange behaviors. From how we use mobile phones to how we traverse grocery stores, none of us are exactly the same. We don't know why we do what we do. We don't really know why we like what we like, but we do know it when we see it. We're fickle.
You may play several of these roles yourself. Be aware of potential conflicts there.
A swim lane diagram depicts how multiple players work together to complete a task or interact within a process. The result is a list of tasks for each user. This is especially useful when you're trying to understand how different teams or people work together.
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).
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.
Classifying a tomato as a vegetable says something about what you know about your customers and your grocery store. You would classify things differently if you were working on a textbook for horticulture students, right?
A typical grocery store has a hierarchical aisle system, a heterarchical database for the clerk to retrieve product information by scanning a barcode, and sequences for checking out and other basic customer service tasks. I was even in a grocery store recently where each cart had a list of the aisle locations of the 25 most common products. A great use of hypertext.
A typical book has a sequence-based narrative, a hierarchical table of contents, and a set of facets allowing it to be retrieved with either the Dewey Decimal system at a library, or within a genre-based hierarchical system used in bookstores and websites like Amazon.com.