Here we present our use cases that we envision for WAF (our prototype). There are six use cases in total of which four were actually implemented in the prototype and the remaining two were thought of, but not taken into account for the current version of WAF. To note: requirements, claims or IDP columns that are filled in with a - (hyphen) are there to indicate that there is no requirement, claim or interaction design pattern (IDP) belonging to that specific Use Case (UC) step.
Use Case 1: User takes a normal walk without caretakers
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Objective
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Allow people with dementia to take a walk without caretakers.
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TDP
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Human in charge
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Actors
| Person with Dementia (PwD), MiRo
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Pre-condition
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PwD wants to take a walk.
MiRo is ready to lead the PwD.
The walking route is already set by the activity coordinator.
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Post-condition
| PwD has taken a walk without any human assistance and has safely returned to their room.
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Action sequence
| UC steps:
1. PwD equips the proximity grip and gets ready to go.
2. MiRo guides the PwD during the walk.
3. PwD arrives home safely.
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UC step
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Requirements
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Claims
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IDP
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| 1 | - | - | - |
| 2 | MiRo can follow a set route | Walking with MiRo increases the user's happiness | |
| 3 | MiRo can lead the way back home | - | Guiding the human while walking pattern |
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Use Case 2: User gets distracted while taking a walk
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Objective
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Allow people with dementia to take a walk without a caretaker.
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TDP
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Human lost
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Actors
| Person with Dementia (PwD), MiRo
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Pre-condition
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PwD wants to take a walk.
MiRo ready to lead the human.
The walking route is already set.
PwD already wears the proximity grip.
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Post-condition
| PwD has taken a walk and is happily home now.
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Action sequence
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UC steps:
1. PwD takes a walk, MiRo guides PwD during the walk.
2. PwD gets lost, MiRo stops.
3. MiRo tries to get PwD's attention.
4. MiRo regains PwD's attention and they continue walking together.
5. PwD arrives home safely.
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UC step
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Requirements
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Claims
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IDP
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| 1 | MiRo can follow a set route | Walking with MiRo increases the user's happiness | Guiding the human while walking pattern |
| 2 | MiRo can detect if the PwD is too far away | - | Guiding human back pattern |
| 3 | MiRo can make sounds | - | Getting attention pattern |
| 4 | MiRo can follow a set route | Walking with MiRo increases the user's happiness | Guiding the human while walking pattern |
| 5 | - | - | - |
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Use Case 3: User walks away while taking a walk
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Objective
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Allow people with dementia to take a walk without caretakers.
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TDP
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Human lost
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Actors
| Person with Dementia (PwD), MiRo, Caretaker
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Pre-condition
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PwD wants to take a walk.
MiRo is ready to guide the human.
The walking route is already set.
PwD already wears the proximity grip.
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Post-condition
| PwD has taken a walk and is safely home now.
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Action sequence
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UC steps:
1. PwD takes a walk, MiRo guides PwD during the walk.
2. PwD walks away, MiRo stops.
3. MiRo tries to get PwD's attention.
4. MiRo fails to regain PwD's attention and notifies caretaker.
5. Caretaker arrives and guides PwD back home safely.
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UC step
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Requirements
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Claims
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IDP
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| 1 | MiRo can follow a set route | Walking with MiRo increases the user's happiness | Guiding the human while walking pattern |
| 2 | MiRo can detect if the PwD is too far away | - | Guiding human back pattern |
| 3 | MiRo can make sounds | - | Getting attention pattern |
| 4 | MiRo can notify caretakers | - | - |
| 5 | - | - | - |
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Use Case 4: User falls while taking a walk
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Objective
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Allow people with dementia to take a walk without caretakers.
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TDP
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Robot in charge
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Actors
| Person with Dementia (PwD), MiRo, Caretaker
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Pre-condition
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PwD wants to take a walk.
MiRo is already present in the room.
The walking route has already been set.
PwD already wears the proximity grip.
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Post-condition
| PwD has taken a walk and made it home safely.
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Action sequence
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UC steps:
1. PwD takes a walk, MiRo guides PwD during the walk.
2. PwD falls and cannot get up, MiRo stops.
3. MiRo notifies caretaker.
4. Caretaker arrives and helps PwD.
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UC step
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Requirements
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Claims
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IDP
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| 1 | MiRo can follow a set route | Walking with MiRo increases the user's happiness | Guiding the human while walking pattern |
| 2 | MiRo can detect if PwD needs help | - | - |
| 3 | MiRo can notify caretakers | - | - |
| 4 | - | - | - |
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Future work: snoezelen
Use Case 5: User that likes dogs snoezels with MiRo
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Objective
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Provide people with dementia a companion.
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TDP
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Human in charge
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Actors
| Person with Dementia (PwD), MiRo
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Pre-condition
| MiRo is already in the room.
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Post-condition
| PwD has bonded with MiRo.
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Action sequence
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UC steps:
1. MiRo is placed in front of a PwD.
2. PwD pets MiRo's head and body, MiRo reacts positively.
3. PwD feels better.
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UC step
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Requirements
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Claims
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IDP
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| 1 | - | - | - |
| 2 | MiRo can react positively to snoezelen | - | - |
| 3 | - | PwD will become either more relaxed at best or not bothered at worst | - |
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Use Case 6: User that dislikes dogs snoezels with MiRo
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Objective
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Provide people with dementia a companion.
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TDP
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Human in charge
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Actors
| Person with Dementia (PwD), MiRo
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Pre-condition
| MiRo is already in the room.
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Post-condition
| PwD has not bonded with MiRo.
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Action sequence
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UC steps:
1. MiRo is placed in front of a PwD.
2. PwD pets MiRo's head and body, MiRo reacts positively.
3. PwD doesn't feel better than before.
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UC step
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Requirements
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Claims
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IDP
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| 1 | - | - | - |
| 2 | MiRo can react positively to snoezelen | - | - |
| 3 | - | PwD will become either more relaxed at best or not bothered at worst | - |
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