Class10

Analyzing system data: Class diagram Asper School of Business University of Manitoba Systems Analysis & Design Instructor: Bob Travica Updated: October 2009

Outline ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],3510 Systems Analysis & Design * Bob Travica of 16

Problem domain classes ,[object Object],[object Object],[object Object],[object Object],3510 Systems Analysis & Design * Bob Travica of 16

Identifying things to be represented in system 3510 Systems Analysis & Design * Bob Travica of 16 Physical reality - Person who is a customer customerNumber customerName customerAddress … Customer addNew() change() … System - a class Customer

Identifying things to be represented in system (cont.) 3510 Systems Analysis & Design * Bob Travica of 16 PEOPLE, OPERATIONS, CONCEPTS,

Identifying things to be represented in system (cont.) ,[object Object],[object Object],[object Object],3510 Systems Analysis & Design * Bob Travica of 16

Identifying things to be represented in system – Master and Transaction Data ,[object Object],[object Object],[object Object],[object Object],3510 Systems Analysis & Design * Bob Travica of 16

Associations among things ,[object Object],[object Object],[object Object],[object Object],3510 Systems Analysis & Design * Bob Travica of 16

Associations among things (cont.) 3510 Systems Analysis & Design * Bob Travica of 16 ,[object Object],[object Object],[object Object],“ PLACES ” “ WORKS IN ” CUSTOMER EMPLOYEE

Associations between Master and Transaction Data ,[object Object],[object Object],3510 Systems Analysis & Design * Bob Travica of 16 3510 Systems Analysis & Design * Bob Travica of 16 Customer Order Order Product X Master Data Transaction Data orders places contains

Multiplicity (basic idea) 3510 Systems Analysis & Design * Bob Travica of 16 ,[object Object],[object Object],[object Object],Places 1 order, and can place more. But each order is placed by just one person. Works in 1 dept., while this dept. has other workers as well. CUSTOMER EMPLOYEE “ WORKS IN ” Contains 2 items or more

Understanding things -attributes ,[object Object],[object Object],[object Object],[object Object],[object Object],3510 Systems Analysis & Design * Bob Travica of 16

Attributes 3510 Systems Analysis & Design * Bob Travica of 16 Attributes ,[object Object],[object Object],[object Object],[object Object],Values

Class elements ,[object Object],[object Object],[object Object],3510 Systems Analysis & Design * Bob Travica of 16 Class courseNumber courseTitle creditHours Course addCourse()

Associations between classes: Generalization/Specialization 3510 Systems Analysis & Design * Bob Travica of 16 Class (Superclass) Subclasses of MotorVehicle Subclasses of Car

Associations between classes: Part-Whole 3510 Systems Analysis & Design * Bob Travica of 16 Part classes Whole class

Associations between class objects 3510 Systems Analysis & Design * Bob Travica of 16 1 * has ,[object Object],[object Object],[object Object],[object Object],courseNumber courseTitle creditHours Course addCourse() sectionNumber startTime roomNumber Section openSection() closeSection()

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