A use scenario turns a feature conversation into a shared view of the moment where someone must act.
Concept of the week · The Moment Carries the Risk
A use scenario describes a specific user, task sequence, environment, system response, and the pressure around the work. It only creates value when teams can find it, trust it, and use it before decisions are made. A feature list says what the product should do; a use scenario shows what someone must notice, decide, check, and recover from in the moment.
Design standard: Treat every important feature as unfinished until its core use scenario is observed, written, easy to retrieve, and reviewed with the team.
I just came back from a Human Factors conference, where a usability engineer presented several UX repositories used by their team.
One repository stood out: a use scenario collection built from observations in hospitals. Each case included the clinical setting, the user role, the task breakdown, and a de-identified, composite AI-generated image of the user in the scene.
A bedside transfer, an alarm response, or a device setup no longer appeared as a generic workflow. It became a visible work scene with hands, timing, interruptions, and consequences.
Instead of discussing a feature in isolation, the team could consider the working context: the room, posture, interruption, device, task, and risk. What was once a scattered observation became a shared design object.
Many teams still move too quickly from observation to feature request. A better step is to turn the observation into a reusable scene that helps engineers, designers, product managers, and safety experts ask better questions before committing to a solution.
But the repository itself needs design. If the tool is hard to search, the tags are unclear, or adding a scenario feels like extra work, the collection quietly becomes another place where insights disappear.
The same pattern applies outside healthcare. In commercial product design, a scenario repository can show how a field technician repairs a device in poor lighting, how a shopper compares options while distracted, or how a support agent recovers after state loss.
Every use scenario that becomes part of the design changes the evaluation plan: who to include, which tasks to simulate, which interruptions to introduce, which use errors to watch for, and what evidence the team needs before moving forward.
Shipping cue: Version each use scenario with an owner, observation source, date, scenario ID, and a small set of stable tags so requirements, risk controls, prototypes, and formative findings can point to the same moment without manual lookup.
A use scenario makes the moment visible:
User: Nurse
Setting: Bedside care environment
Trigger: A patient state or device signal requires attention
Task flow: Notice → assess → check patient and monitor → decide next step
System response: The product displays signals, alarms, trends, and required actions
Use safety concern: Under pressure, hidden checks, interruptions, or unclear signals can lead to delay, confusion, or missed action
Source + status: Example sketch; validate against observation before use
AI and use scenarios: AI can help a team see the scene more clearly, especially when an observation has been reduced to a requirement, risk, or backlog item. But a generated image can also make a thin observation feel more certain than it is. AI can illustrate a scenario, but it must not become the evidence. In regulated or high-stakes work, the source of truth remains the observed task, user role, use environment, device response, and documented risk-control rationale.
Asset & resource
Use Scenario Card. Capture the moment on one page:
Scenario sketch: Add one simple sketch, photo, or storyboard of the moment. Mark it clearly as observed, recreated, or illustrative.
User + setting: Who is acting, and where does the work happen?
Trigger + task flow: What starts the situation, and what steps, interruptions, and hidden checks follow?
System response + use safety concern: What does the product show, hide, delay, or require — and what could go wrong under pressure?
Source + status: Where did this scenario come from, who owns it, and when was it last reviewed?
Attach one observed artifact or de-identified composite scene image only if it helps the team discuss the situation more accurately.
Resource: Maria Rosala’s Why Research Repositories Fail and How to Get Them Right from Nielsen Norman Group. It is useful here because it shows that a repository is not just a tool choice. It needs ownership, simple contribution, clear structure, and repeated use before it becomes part of how teams make decisions.
Light wisdom & reflection
“Plans are resources for situated action.”
A use scenario is not a script for reality. It is a resource for seeing what action depends on: the setting, the pressure, the tools, the interruption, and the person trying to move forward.
Where might your team be treating a scenario as a fixed workflow instead of a living view of use?
Mindful practice
Choose one ordinary moment today where you feel slightly rushed.
Before you act, pause for one breath and look at the full scene.
What is asking for your attention?
What are you assuming too quickly?
Notice whether the situation becomes clearer when you stop treating one detail as the whole story.
Best,
Andreas Walden
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