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Definitions of stage two pile-sorting categories.
| Usability | |
|---|---|
| Pile 1 | Able to use the device in the community setting |
| Pile 2 | Able to use the device with reservations in the community setting |
| Pile 3 | Possibly unable to use the device in the community setting |
| Pile 4 | Unable to use the device in the community setting |
| Scalability | |
| Pile 1 | Feasible to scale up |
| Pile 2 | Feasible with reservations to scale up |
| Pile 3 | Possibly unfeasible to scale up |
| Pile 4 | Unfeasible to scale up |
