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Introduction to Unified Modeling Language (UML). Professor Jason Chen School of Business Administration Gonzaga University Spokane, WA 99258. Methods vs. Modeling Languages. A model has its purpose of structuring our thoughts A method

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introduction to unified modeling language uml

Introduction to Unified Modeling Language (UML)

Professor Jason Chen

School of Business Administration

Gonzaga University

Spokane, WA 99258

methods vs modeling languages
Methods vs. Modeling Languages
  • A model has its purpose of structuring our thoughts
  • A method
    • is an explicit way of structuring one’s thinking and actions
    • tells us:
      • What to do
      • How to do it
      • When to do it
      • Why it’s done
process vs method
Process vs. Method
  • A process is a group of activities that, if done correctly, will achieve an explicit goal.
  • A method, in contrast, is normally also considered as a set of related activities, but without explicit goals, resources, and rules.
what is a process

[VALUE]

Rules

Documentation,

Products, Models

etc.

Resources

Process

What is a Process?

<<Utilize>>

Humans,

computers

tools,

Information

What to do,

How to do it,

When to do it,

Why it should be done

what is a process1

Rules

Resources

Process

What is a Process?

Software Development:

Process CONTEXT,

USER, STEPS

[VALUE]

<<Utilize>>

Documentation,

Products, Models

etc.

Humans,

computers

tools,

Information

Aprocessis a group of activities that, if done correctly, will achieve an explicit goal.

What to do,

How to do it,

When to do it,

Why it should be done

slide7

Methods vs. Modeling Language

How symbols should look

Syntax

Reality

How symbols are combined

(Spelling)

Semantics – what each symbol means

(meaning)

Pragmatic – intentions of symbols used

Software System

(Aspects)

Rules

Represent

Models

Notations

Expressed in

Generating

Modeling Language

Method

Help

Process

Document

analysis vs design oriented

·

·

What (the problem is)

How (to create a solution)

·

Logical solution

Requirements of the

·

system

Physical solution

·

·

Investigation of

·

Technical implementation

domain

solution (code)

(Understanding the

problem)

Analysis vs. Design Oriented

Analysis-Oriented

Design-Oriented

what is the uml
What is the UML?
  • UML is only a modeling language without a process
    • it is a lot easier to comprehend than a natural language
  • Most modeling languages cover only syntax and semantics
    • Pragmantics is a bit difficult to decide since it can’t be formalized; it can only act as a guideline.
uml conti
UML (conti.)
  • The Unified Modeling Language (UML) is a graphical language for visualizing, specifying, constructing, and documenting the artifacts of a software-intensive systems.
what does uml give you
What does UML give you?
  • The UML gives you a standard way to write a system’s blueprints covering conceptual things, such as business processes and system functions, as well as concrete thins, such as classes written in a specific programming language, database schemas, and reusable software components.
how applicable of uml
How Applicable of UML?
  • The UML is applicable to anyone involved in the production, deployment, and maintenance of software.
what is visual modeling
What is Visual Modeling?
  • VISUAL MODELING is a way of thinking about problems using (graphical) models organized around real-world idea.
  • UML is a product of VISUAL MODELING language.
models are useful for
Models are useful for ..
  • understanding problems,
  • communicating with everyone involved with project (customer, domain experts, analysts, designers, etc.)
  • modeling enterprise,
  • preparing documentation, and
  • designing programs and databases
objectives of the modeling
Objectives of the Modeling

Modeling promotes:

  • better understanding of requirements,
  • cleaner designs, and
  • more maintainable systems.
what is a good model
What is a Good Model?

A model is good when:

  • it is a relevant model
  • it is possible to communicate
  • it fits its purpose
  • it captures the essentials
1 it is a relevant model
1. it is a relevant model
  • a relevant model captures the important aspect of whatever is being studied.
2 it is possible to communicate
2. it is possible to communicate
  • a good model should be easy to communicate, have an explicit goal, be easy to maintain, be consistent , and have integrity. Issues such as name conventions and model coordination/integration should be enforced.
3 it fits its purpose
3. it fits its purpose
  • a good model should have an explicit purpose that everybody using it recognizes.
4 it captures the essentials
4. it captures the essentials
  • a good model should be able to capture the essence of the business (the core) and model around those core concepts, and to be able to handle changes properly (not just involves and /or creates documents.)
slide21

Business and Modeling Environment

Examples:

Model

Meta-Data

Invoice

Core/Essence

Data

Debt

Furniture Store

Business

Reality

slide22

Business and Modeling Environment

Examples:

Model

Meta-Data

Invoice

Core/Essence

Data

Debt

Furniture Store

Business

Reality

other problems
Other Problems?
  • No matter which method and modeling language have been used, there are other problems.
  • When we make the models and we become a part of business. Therefore, other problems should be taken into consideration: internal politics, social patterns, informal structure, and power surrounding the customers.
a system model for uml
A System Model for UML

System

Model

Analysis

Design

Implementation

Deployment

Model

Model

Model

Model

Physical Architecture

A system is described in several models

slide25
Analysis: functional requirements
  • Design: working technical solutions
  • Implementation: source code
  • Deployment: description of how the system is deployed

UML is phase independent and it is a modeling language (NOT a method)

Tool vendors now can spend more time improving on the tools and less time on defining methods and languages.

development of object technology

OO-D

OO-A

OO-P

Development of Object Technology

UML

C++, JAVA

SmallTalk, etc.