SHMUC Use Case B3

Late For Church: (Ver. 1.0)


SHMUC prototype > B_Time_of_Occurrence_Use_Cases  >  B3_Late_For_Church



To cope with situations in which the Smart Home raises an alarm unnecessarily

Actors Mary, the Smart Home

Initial State

Mary was at home alone on Friday


Mary goes to church each Friday morning at 0930. She usually leaves at 0900 since it is a 20-25 minute walk. One Friday morning her friend rang and offered her a lift, and she accepted. The system noticed that she did not leave the house as usual at 0900, and raised an alarm for Mary.

Norm Mary leaves the house to go to church within 5 minutes of 0900


A wrong alert was raised.

System Design Implications

There is some data that the system cannot possibly know, and it will therefore reason incorrectly. 

When such situations occur, they need to be identified and corrected. If the Smart Home  detects an anomalous start time and requests clarification from Mary, then she can explain that the behaviour is unusual (i.e., the Smart Home should not adjust its implicit schedule*, but acceptable in this instance.

Perhaps the first time this situation occurs, the Smart Home can also ask daughter Debbie for clarification, and if she says that it's OK (essentially telling the system that her mother's word is to be relied upon), the Smart Home may only request clarification from Mary in future.

* I'm using the phrase implicit schedule to refer to a schedule that the Smart Home derives from observation of the inhabitant's behaviour. This is in contrast to an explicit schedule which would be maintained by explicit interactions by the inhabitant or carer.