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Task 2: View real-time location of social contacts	Storyboard	Learnability	Efficiency	Safety	Visibility
	Recall that Joe is looking for Bob, who isn't there to meet him. From the home screen, Joe clicks on People and then finds Bob. By staying in the "now" tab, he can see Bob's exact location on a map.	Pros: - Design has external consistency with other mobile apps - Provides visual feedback by showing the map. - It speaks the language of the user since the labels are easy to understand. Cons:	Pros: - The current location is clearly shown to the user. Easy to view in a couple of glances. Cons: - The user has to browse through the entire list of contacts to spot the friend. Having a search feature will be more efficient, since that is externally consistent with other mobile applications.	Neutral: - Might press on Alice when you want to view Bob. This can be solved by using the back button on the app. Pros: Cons:	Pros: - The map is large on the screen and provides strong information scent by showing only the essential details. Cons:

Task 3: View offers and opt-in to create commercial contacts	Storyboard	Learnbility	Efficiency	Safety	Visibility
	Deals are offered based on proximity. Joe is at the resort and is looking to buy some ski gear. He sees that Rei and Walmart are offering deals. He is more of an REI kind of guy, so he explores that deal, and finds out that Rei is willing to give him 3% off of his purchase if he agrees to share with them whenever he is at an Rei location. He signs up by clicking Sign Up.	Pros: Cons: -	Pros: Cons: - If there are multiple nearby stores providing offers, the user has to manually scroll through the entire list to spot offers that he is interested in. Having a search feature will be more efficient.	Pros: Cons: - The user may inadvertently agree sharing location information with Rei. The design lacks a confirmation step to prevent such errors.	Pros: - Important details (from the merchant and from the user) are clearly communicated. Cons: - The exact meaning is not conveyed. What does it mean to "tell them". What exactly will LocaShare tell them? Providing a sample message showing data that will be given to the merchant will be helpful.

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Task 4: View aggregate information of social contacts	Storyboard	Learnability	Efficiency	Safety	Visbility
	Joe's mom Alice has access to Joe's city-location and wants to view it. She hits People from the home screen and then selects Joe. She clicks on the History tab to see a list of places Joe has been.	Pros: Since this screen is easily accessible from that in task 2 (thus providing internal consistency), this task is easy to learn. Cons: -	Pros: Cons: -	Pros: Cons:	Pros: Cons: -

Task 5: Edit social contacts	Storyboard	Learnability	Efficiency	Safety	Visibility
	After the ski trip, Joe wants to stop sending his location to Bob. First he browses to the share by clicking on Bob in his contacts. He sees the Vacation share, and can click on it to view the details of the share. He can then delete it either directly from the details view, or by returning to the listing screen and selecting it from there.	Pros: The mechanism to delete is externally consistent (the minus symbol) with other mobile apps. Cons: The design does not provide affordances for the user to learn how to navigate through the steps described.	Pros: Enabling deletion based on the pre-defined settings can reduce the need to view detailed information that the contact can see. Cons:	Pros: Cons:	Pros: Cons: Only the names are displayed on the first screen. It would be helpful to show a hint of the actual information that the contact can see.

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