Software project Management Use cases

Use case ID: satellite#1

Use case Name: Login

Actor that initiatesthe use case:

-------Actor1:administrator

-------actor2:the System Server

Other actors: None

Statementof the purpose of this use case:

The the administrator enter the system of the satellite

Preconditions:

------The administrator must has the permission of entering the system. In other word, he must has the right username and password.

Primary Scenario:

------The administrator input the right username and password and enter the button of ' login ', and then he'll enter the System.

------The system can return the successful message to the screen.

post-conditions:

------The administrator can log out of the system.

Alternative Scenarios (Exception handing):

------Give The administrator the warning message "Your username or password is wrong".

Comments: The system should return result on time.

Use case ID: satellite#2

Use case Name: Warning of the space rubbish collision.

Actor that initiatesthe use case:

-------actor1:the System

-------actor2:the Administrator

Other actors: None

Statementof the purpose of this use case:

The system detects the space rubbish and gives the warning message of the possibility of collision. The administrator would deal with it.

Preconditions:

------The detection system of the satellite finds the space rubbish which is near the satellite orbit.

Primary Scenario:

------The detection system gives a warning message in the screen.

post-conditions:

------The Administrator click the button of "I get this message".

------The administrator would deal with this.

Alternative Scenarios (Exception handing):

------The administrator ignore the warning message and the system would sent it again until the administrator deal with it

Comments: The system should return result on time.

Use case ID: satellite#3

Use case Name: Taking pictures of the universe

Actor that initiatesthe use case:

-------actor1:the System

-------actor2:the Administrator

Other actors: None

Statementof the purpose of this use case:

The administrator adjusts the camera to take photo of the universe and download the pictures.

Preconditions:

------The administrator adjusts the camera through the dragging of the mouse and click the button of "taking picture".

Primary Scenario:

------The Taking-pictures system takes the photo and shows the pictures in the.

post-conditions:

------The Administrator click the button of "Download this pictures".

Alternative Scenarios (Exception handing):

------The administrator takes the pictures but he doesn ' t save it. And then the system would give a message "If you don ' t save the photo the system would delete it"

Comments: The system should return result on time.

Software project Management Use cases