Week 4- Beginning Analysis

Todays lecture covered:
-Analysis models
-Events
-Things and systemr requirements
-UML

Analysis Models:
-Help us understand the system
-Types of models:
.:. Mathematical- formula's, accounting
.:. Descriptive- event tables, narrative memos
.:. Graphical- diagrams, schematic representations
-Models used in analysis- event list, dfd, ERD, class diagrams

Events:
-Occurences at a specific time and place
-Types of events:
.:. External- outside the system
.:. Temporal- reaching a point in time
.:. State- internal trigger

Things and system requirements:
-define sys requirements by understanding what information needs to be stored
-what things does the sytem need to know about and store information about?
-characteristics of thigns:
.:. relationship- cardinality
.:. attribute - specific peice of information about a thing

And that will do.