Download - Ahab’s Leg
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Ahab’s Leg Exploring the Issues of Communicating Semi-Formal Requirements to the Final
Users
Luca Sabatucci – Hammamet, 12/06/2010 – CAISE’10
Chiara Leonardi, Luca Sabatucci, Angelo Susi, Massimo Zancanaro
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From users to requirements and back again Presenting requirements to final users The Ahab’s Leg Lesson learnt
Agenda
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Objective: ◦ Ambient Aware Assistance◦ High-developed smart environment for nursing
home Multidisciplinary nature:
◦ software engineers, sociologists, analysts◦ end-users involved in the process
Technology:◦ Software + Hardware◦ Network of distributed sensors
Non Functional Requirements:◦ Privacy◦ Acceptance
The Project Context
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The Process
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Field Data Collection: Interviews
4 interviews to managers, 18 interviews to caregivers
3 representative sites in Trento (from 20 to 200 guests)
Dimensions:usersservicesenvironmentproceduresresourcesproblemsneeds
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Data Interpretation: Tropos
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Consolidation: Persona, Activity Scenario
5 personas 1 caregivers 1 nurse3 guests
6 activity scenariosMaria is in RSA since 3 months and she never tried to escape.After lunch, she leaves the group and decides to go back her room, in the second floor. She goes up the stairs and she falls down.Maria is still conscious and asks for caregivers help. Sabrina, full time OSS, hears Maria’s call and reaches her in the stairs…
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Envisioning Phase
Maria is leaving the restoration room, and the sensor on the door sends a signal to Sabrina’s PDA that alerts with a vibration. Sabrina knows that a vibration means Maria is moving out from the room, but she cannot follow her in that moment because she must oversee the room.[whether Maria leaves the room with other guests or with a caregiver, the alarm would not be sent]Maria is going upstairs in order to reach her private room but when she is on the staircase, she falls.The camera identifies the event and sends warning signals to caregivers' PDA.Sabrina's PDA displays an unknown person is fallen down in the staircase between second and third floors….
1 devil’s advocate session
78 high-level functional requirements
79 non-functional requirements
5 macro-services:localization, tracking,identity recognition,behavior recognition,coordination,reporting.
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Validation with Visual Scenarios
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The Ahab’s Leg
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… of these high mortal miseries, carries us at last among the sourceless primogenitures of the gods; so that, in the face of all the glad, hay-making suns, and soft-cymballing, round harvest- moons, we must needs give in to this: that the gods themselves are not for ever glad. The ineffaceable, sad birth-mark in the brow of man, is but the stamp of sorrow in the signers. Unwittingly here a secret has been divulged, which perhaps might more properly, in set way, have been disclosed before. With many other particulars concerning Ahab, always had it remained a mystery to some, why it was, that for a certain period, both before and after the sailing of the Pequod, he had hidden himself away with such Grand-Lama-like exclusiveness; and, for that one interval, sought speechless refuge, as it were, among the marble senate of the dead. Captain Peleg's bruited reason for this thing appeared by no means adequate; though, indeed, as touching all Ahab's deeper part, every revelation partook more of significant darkness than of explanatory light. But, in the end, it all came out; this one matter did, at least. That direful mishap was at the bottom of his temporary recluseness. And not only this, but to that ever-contracting, dropping circle ashore, who, for any reason, possessed the privilege of a less banned approach to him; to that timid circle the above hinted casualty - remaining, as it did, moodily unaccounted for by Ahab - invested itself with terrors, not entirely underived …
1956 Ray Bradbury & John Huston. starring Gregory Peck as captain Ahab
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1930 Warner Bros. Directed by Lloyd Bacon. With John Barrymore, Walter Long, Noble Johnson
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AL: DefinitionThe Ahab‘s dilemma consists in
the necessity to add more details to the original storyline,
because of the different characteristics of the target
media or because of the use of a different communication styles,
that the story requires to be engaging
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AL1: time and placeAL2: wearable sensor and receiverAL3: receiver on the door AL4: PDA
AL5: device in the pocket AL6: vibration
34 ALs from the 28 frames of the 5 scenarios
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cause of the difference in translation
impact on the target language
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AL1: time and place
early design
details
symbols
resources
context
working practice
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AL2: wearable sensor and receiver
early design
details
symbols
resources
context
working practice
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AL4: PDA
AL5: device in the pocket AL6: vibration
early design
details
symbols
resources
context
working practice
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Re-thinking the approach
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ANYQUESTIONS?