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d. Use Cases

Version 4.1 by Alexandru Bobe on 2023/03/14 12:27

We start with only 2-3 use cases in order to be able to have an efficient and streamlined design process. We tried to narrow the scope of our robot such that we can better prioritize the features and create a targeted solution.

Use case 1: Help PwD to paint

ObjectiveSupport the PwD in a meaningful craft
TDPPwD wants to paint
ActorsPwD, robot, caregiver
Pre-conditionThe patient with dementia expresses an interest in painting and the necessary materials are available.
Post-conditionThe patient with dementia has completed a painting and feels a sense of accomplishment.
Action sequence

UC steps: 

1. The PwD tells the caregiver that he wants to paint

2. The caregiver brings the robot

3. The robot greets the PwD

4. The robot starts the painting activity by asking the person several questions:

  • Do you have the paint, the brush and the canvas?
  • Do you know what you want to paint?
  • Do you have a comfortable position to start painting?

5. While painting, the robot asks the PwD:

  • Do you want to listen to some relaxing music?
UC StepRequirementsClaimsIDP
1---
2--

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3The robot can talk or show text on a tabletThe robot can grab the attention of the PwD%TODO
4The robot knows a set of predefined questions to ask a PwD when a painting session is about to start.Breaking a complex task, like painting, into smaller subtasks helps the PwD achieve his goal. %TODO
5The robot can play relaxing musicCalm music helps the PwD relax while painting.%TODO

Use case 2: Remind the PwD to engage in painting

ObjectiveHelp the PwD maintain his identity
TDP-
ActorsPwD, robot
Pre-condition

The PwD had painted before

The PwD walks by the robot.

The PwD hasn't painted in the last 3 days.

Post-conditionThe person decides to start a session of painting
Action sequence

UC steps: 

1. The person walks by the robot and the robot recognizes him.

2. The robot asks the PwD if he painted anything recently and if he wants to start painting now. 

UC StepRequirementsClaimsIDP
1The robot is able to recognize a specific patient and remembers their preferences--
2The robot can talk or show text on a tabletThis interaction can trigger a PwD to start a session of painting.

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Use case 3: Calm down PwD 

Use case 4: Recommend a meaningful picture to paint

Use case 5: Alert the caregiver in case of emergency