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Ahab’s Leg

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Luca Sabatucci
Luca Sabatucci

Luca Sabatucci Ahab’s Leg - Exploring the Issues of Communicating Semi-Formal Requirements to the Final Users Hammamet, 12/06/2010 – CAISE’10

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Exploring the Issues of Communicating Semi-Formal Requirements to the Final Users ChiaraLeonardi, Luca Sabatucci, Angelo Susi, Massimo Zancanaro Luca Sabatucci – Hammamet, 12/06/2010 – CAISE’10
 From users to requirements and back again  Presenting requirements to final users  The Ahab’s Leg  Lesson learnt
 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
Ahab’s Leg
3 representative sites in Trento (from 20 to 200 guests) 4 interviews to managers, 18 interviews to caregivers Dimensions: users services environment procedures resources problems needs
Ahab’s Leg
5 personas 1 caregivers 1 nurse 3 guests 6 activity scenarios Maria 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…
1 devil’s advocate session 5 macro-services: localization, tracking, identity recognition, behavior recognition, coordination, reporting. 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 78 high-level Maria is moving out from the room, but she cannot functional follow her in that moment because she must oversee the room. requirements [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 79 non- room but when she is on the staircase, she falls. The camera identifies the event and sends warning functional signals to caregivers' PDA. requirements Sabrina's PDA displays an unknown person is fallen down in the staircase between second and third floors….
Ahab’s Leg
The Ahab’s Leg
1956 Ray Bradbury & John Huston. … of these high mortal miseries, carries us at last among the sourceless primogenitures of the gods; starring Gregory Peck as captain Ahab 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
1930 Warner Bros. Directed by Lloyd Bacon. With John Barrymore, Walter Long, Noble Johnson
The Ahab‘s dilemma consists in the necessity to add moredetails 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
AL1: time and place AL2: wearable sensor and receiver AL3: receiver on the door AL4: PDA AL5: device in the pocket AL6: vibration 34 ALs from the 28 frames of the 5 scenarios
cause of the difference in translation Early Level of Use of design details symbols impact on the target language Working Resource Context Practice
early details symbols design resourc es context workin g practice AL1: time and place
early details symbols design resourc es context workin g practice AL2: wearable sensor and receiver
early details symbols design resourc es context workin g practice AL4: PDA AL5: device in the pocket AL6: vibration
Ahab’s Leg
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Ahab’s Leg

  • 1. Exploring the Issues of Communicating Semi-Formal Requirements to the Final Users ChiaraLeonardi, Luca Sabatucci, Angelo Susi, Massimo Zancanaro Luca Sabatucci – Hammamet, 12/06/2010 – CAISE’10
  • 2. From users to requirements and back again  Presenting requirements to final users  The Ahab’s Leg  Lesson learnt
  • 3. 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
  • 5. 3 representative sites in Trento (from 20 to 200 guests) 4 interviews to managers, 18 interviews to caregivers Dimensions: users services environment procedures resources problems needs
  • 7. 5 personas 1 caregivers 1 nurse 3 guests 6 activity scenarios Maria 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…
  • 8. 1 devil’s advocate session 5 macro-services: localization, tracking, identity recognition, behavior recognition, coordination, reporting. 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 78 high-level Maria is moving out from the room, but she cannot functional follow her in that moment because she must oversee the room. requirements [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 79 non- room but when she is on the staircase, she falls. The camera identifies the event and sends warning functional signals to caregivers' PDA. requirements Sabrina's PDA displays an unknown person is fallen down in the staircase between second and third floors….
  • 11. 1956 Ray Bradbury & John Huston. … of these high mortal miseries, carries us at last among the sourceless primogenitures of the gods; starring Gregory Peck as captain Ahab 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
  • 12. 1930 Warner Bros. Directed by Lloyd Bacon. With John Barrymore, Walter Long, Noble Johnson
  • 13. The Ahab‘s dilemma consists in the necessity to add moredetails 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
  • 14. AL1: time and place AL2: wearable sensor and receiver AL3: receiver on the door AL4: PDA AL5: device in the pocket AL6: vibration 34 ALs from the 28 frames of the 5 scenarios
  • 15. cause of the difference in translation Early Level of Use of design details symbols impact on the target language Working Resource Context Practice
  • 16. early details symbols design resourc es context workin g practice AL1: time and place
  • 17. early details symbols design resourc es context workin g practice AL2: wearable sensor and receiver
  • 18. early details symbols design resourc es context workin g practice AL4: PDA AL5: device in the pocket AL6: vibration

Editor's Notes

  • #10: to raise the dramatic tension to the story
  • #12: peg-leg, made from a whale jaw
  • #13: 1956, John Houston directed a film adaptation of the book starring Gregory Peck as Captain Ahab
  • #14: Ahab‘s legs are often unavoidable and they do not necessarily represent a problem unless they bring the viewers (or the stakeholders) to draw unwanted inferences that can contradict other aspect of the story ordivert their attention to the important aspects of the story.In other cases, when stakeholders complain about a specific aspect of a scenario, it may be the case that the corresponding requirement is wrong or not well understood by the designers. Indeed, spotting these problems in the requirements is precisely the purpose of scenarios as we used them.