Understanding the needs of professionals for which location matters, like firemen. –> comparisons of the two groups –> location awareness model –> outcome: set of requirements for a location awareness tool.

The framework can be situated cognition: the context is a resource for the reasoning or problem solving or cognitive activity. In the context of geologist they explained that when they have to measure something at a specific location they memorise the area (if there is a river, a road, …) plus they take a picture of this place with a camera, plus they record the GPS location, they write it on their notebook or on their map. All this tasks to help them to remember.

We can focus on the comparison of the two groups.