1. The document describes three use cases for a music streaming application: browsing artists and songs, using the inbox to message other users, and downloading music. 2. The browsing use case allows users to search the application's music catalog and view recommendations. 3. The inbox use case lets users send and receive messages from other users and view previously sent messages. 4. The download music use case enables users to search for songs, preview them, and download file versions to listen offline.

1. User
LogIn / Sign Up
Browse for artist/song
Inbox
extend
Download free music
USE CASE DIAGRAM
Register
Account
Send Message
Extend

2. USE-CASE NARRATIVE
1.Browse Artist / Song
2.Inbox
3.Download Music

3. Identification Summary
Title: Browse Artist / Song
Summary: This use case tell us how to search or browse our favourite
song/artist.
Actors:
User - the one who will act to use the gestures of browsing.
Last.fm- the one who will react on the gestures of the user
Creation Date: July 8, 2013 Date of Update: July 8, 2013
Version: V1.0 Person in Charge: Joseph Flores
Flow of Events:
Preconditions:
1. The user of the last.fm had sign-in account use-case.
2. The user can also connect the account thru facebook.
Main Success Scenario:
1. User click the home.
2. User will click the music and show all the category.
3. The last.fm will give some recommendation in the page.
4. User will browse the category and search songs.

4. Alternative Sequences:
A1a. Download songs
1. It's more easier to download rather than you-tube.
A2b. Search of songs
1.If you type a letter or song in the search bar it will pop out
automatically.
Error Sequence:
1. Too long for searching.
2. Wrong selection decision.
3. Not giving exact information.
Post-Condition:
1. New songs on the list.

5. Identification Summary
Title: Inbox
Summary: This use case describes the inner part of the inbox.
Actors:
1. User - the user will create a message.
2. Last.fm - the other user of last.fm will send a message of
request.
Creation Date: July 8, 2013 Date of Update: July 8, 2013
Version: V1.0 Person in Charge: Joseph
Flores
Flow of Events:
Preconditions:
1. The user will create and send a friend request.
Post Conditions:
1. The message of the other users will be seen.
2. The user will have new friends.

6. Main Success Scenario:
1. User will create a message
2. User will ask a friend request.
3. The user will compose message.
4. User can still see the message that he/she had sent.
Alternative Sequences:
A1a. Search messages
1. You can read your previous messages.
Error Sequence:
1. The user might send a foul message and cannot be deleted when it
was sent.

7. Identification Summary
Title: Download Music
Summary: This use case describes how to download music
Actors:
1. User - the user will search and download the file of the song.
2. Last.fm - the last.fm will give the searchable files.
Creation Date: July 8, 2013 Date of Update: July 8, 2013
Version: V1.0 Person in Charge: Joseph Flores
Flow of Events:
Preconditions:
User will search a song.
User will download the file of the song.
Post Conditions:
You can enjoy listening the music you have downloaded.
Main Success Scenario:
Each user can search songs.
User can see the songs on hit.
The user can download the file.
The user can listen to the music before downloading.

8. Alternative Sequence:
A4a: Listen the music before downloading
1. The user can browse and listen first if she/he is looking for the
right music the he/she like.
A4b: Find the your choice music
1. If you have a song the you can find you can search it easily.
Error Sequence:
1. If the user got the wrong downloaded file.
2. If the music is incorrect.