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Subtask | Sub Taks | Sketch | Description | Learnability | Efficiency | Safety |
|---|---|---|---|---|---|---|
Add a Friend | Entering theHome Screen | | This is the home page of out Application. | The screen presents few details to Alice. She sees some of her Friends and quickly realizes that she can find more friends by scrolling down the list or by using the Search text bar. | Alice can immediately search for her friends by tapping the Search text bar near the top of the screen. She has one-tap access to a listing of her Events and Friend Invitations. | Buttons and selections are made large so that Alice can tap the right targets on the screen. Alice may accidentally hit the Exit button when she taps on the Search text bar. |
| Looking up for friends | | Alice taps on the text search bar near the top of the screen. | The Keyboard automatically appears telling Alice to begin typing. Alice is familiar with this feature from using other apps. | It isn't clear whether there are other option for Alice to find her friends besides searching for their names. | The keyboard is rather compact and Alice may find herself accidentally hitting the wrong key. |
| Adding as Friends | | Alice types "Bob" in the search bar. | Alice sees the same list of friends as she saw on the home screen, so she is familiar with the user interface. The buttons to add a friend are colored brightly so that Alice knows she can perform an action by tapping the button. | As Alice types "Bob," the list updates to show close matches to her entry. For longer names, this could allow Alice to find her friend without typing in his entire name. | Alice may want to add Bob as a friend but accidentally hits Borat's "Add" button. We can ask Alice to confirm when she taps to add a friend, but this will increase the number of steps she has to perform. |
Find a Friend | Viewing Friend's Location | | Now that Alice and Bob are friends, they can view each other's locations on a map. | Once Alice selects her friend, a map shows Bob's current location. Furthermore, a blue dot shows Alice's current location. Alice is familiar with the blue dot representing her location, since it is also used in the iPhone's Map app. | Depending on the level of zoom, Alice may need to further zoom in or zoom out of the map. There is a tradeoff between presenting a large map including most her friends' locations, or showing a detailed and smaller map. | If Alice "flicks" her finger past the screen, there is danger that the current map view will be lost. It will take her some steps recreate the map screen showing her and Bob's location. |
| Viewing Friend's Profile | | Alice clicks on the balloon with Bob's name to open Bob's profile. | Bob's profile includes his phone number and email appearing in blue with underlines. This provides Alice with an affordance to click these entries. | By selecting Bob on the map view, Alice immediately sees Bob's profile. She can click on Bob's email or phone number to contact Bob. | If Alice accidentally taps Bob's phone number, then she will begin making a call to him. We can ask Alice to confirm the call, although this will require her to make more selections to accomplish her tasks. |
| Viewing the Events Screen | | Alice sees a list of events she has been invited to or will be attending. | Alice will find this view similar to the earlier Friends view. However, she may not immediately realize that she can adjust the time range of events by tapping on the button on the top-right. | The Events tab allows Alice to immediately see the events she has been invited to or will be attending. Furthermore, she can add an event with one tap. However, if Alice has a longer list of events, there is no option for her to search for the events by keyword. However, Alice can choose to view only events happening in: 1 day, 3 days, 1 week. | Alice may accidentally select the wrong time-range on the top-right drop-down tab. The drop-down tab is rather small, compared to the other selection boxes on the screen. |
Invite friends to an Event | Adding an Event | | A New Event page opens allowing Alice to create a new event and invite friends. | The boxes to enter Event info is brightly colored, providing Alice with an affordance to click on the fields and enter new data. | When adding an event, Alice immediately sees the event info she needs to provide. She can select the time using a drop down box. The drop-down box may require longer time to fill in the information. | Alice can select the time using a drop-down box, which prevents her from typing in a wrong time (e.g. 10:70) |
| Inviting Friends | | Alice taps the Search text bar at the top of the Invite Friends page. | Alice is familiar with these interface from the Search Friends screen she used earlier. Furthermore, she recognizes that she can tap on certain users to invite them, just as she has previously tapped to add users as friends. | When Alice types the Search button in the Invite Firends field, she will encounter a list of her friends. Alice can also quickly search for friends she wants to invite. | Similar to the earlier Add Friends function, Alice may find herself accidentally inviting the wrong friend if she mistaps. To prevent this, we can ask Alice to confirm before sending invitations. However, this would slow down the task process for her. |
RSVP to an Event | Receiving Event Notifications | | Christine, whom Alice invited, received the invite and wishes to change the event to a later time. | If Alice encounters this notification when she is not using the Discover.Me app, she may not realize the notification relates to the Discover.Me app. | The notification concisely tells Alice about Christine's proposal to change the event. To present the notification concisely, no additional information is shown about the proposed event changes. | There is no safety issue because Alice cannot make any selections during the time the notfication box appears. |
| Accepting a Changed Event | |
| If Alice receives the notification while not using Discover.Me, we can immediately transition to this screen in Discover.Me. This will help Alice immediately realize the previous notification relates to Discover.Me | If the notification immediately transitions to this Discover.Me screen, then Alice may find the action disruptive. She may be using another app and find it difficult to return to the previous app she is using. | If the notification immediately transitions to this Discover.Me screen, then Alice may find the action harmful. For example, she may be in the middle of texting a friend. This might cause her to tap incorrectly and accidentally accept the updated event. |
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| | A pop-up box appears telling Alice that she has accepted the changes and that updated invitations will be sent to all people she originally invited. | Alice is familiar with notifications because they are used in other smartphone apps. | The notification concisely tells Alice about Christine's proposal to change the event. To present the notification concisely, no additional information is shown about the event details which have been changed. | There is no safety issue because Alice cannot make any selections during the time the notfication box appears. |
| Viewing Event Status | | Alice can scroll down the event list to see the list of friends she has invited. | Alice views the event info recorded in the same format which she previously input info into. Therefore, she will know where to find certain fields containing info about the event. | If Alice has invited a lengthy list of friends to the event, then she must scroll further down to view the entire list. We can make the friends text shorter to fit more names in a page. However, doing so makes makes it more difficult for Alice to find and select certain friends on the list. | If Alice selects taps on any of the fields displayed on this page, she will be taken to a subpage. This makes navigation cumbersome, since Alice would have to hit back to return to the Events page. |
