The Class model - Systems Analysis and Digital Product
4.4 (59 ratings)
Course Ratings are calculated from individual students’ ratings and a variety of other signals, like age of rating and reliability, to ensure that they reflect course quality fairly and accurately.
219 students enrolled

The Class model - Systems Analysis and Digital Product

System Analysts and Product managers practical guide for building the UML Class Model
4.4 (59 ratings)
Course Ratings are calculated from individual students’ ratings and a variety of other signals, like age of rating and reliability, to ensure that they reflect course quality fairly and accurately.
219 students enrolled
Created by Yosi Wiesel
Last updated 12/2019
English [Auto]
Current price: $16.99 Original price: $24.99 Discount: 32% off
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This course includes
  • 2 hours on-demand video
  • 2 articles
  • 6 downloadable resources
  • Full lifetime access
  • Access on mobile and TV
  • Certificate of Completion
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What you'll learn
  • How to model the business domain with Class model
  • Understand the crucial role of the class model in system life cycle
  • The UML (Unified Modeling Language) of class modeling
  • Using a CASE (Computer-aided software engineering ) tool
  • Understand the logic - from system analysis to system design
  • No

Building the class model is the first and most crucial step in information system analysis.

Countless projects failed and billions of dollars went to the history garbage, because the first step,- to deeply understand the business domain - has been done negligently.

It doesn't have to be like this anymore!

Building the Class model guides you by a very structured and solid method on how to understand and analyze the domain.

It really forces you to think in a structured way; It doesn't let you delude yourself that you "understand" the business world because it forces you to build a model: With strict logic and rules and in well-defined language (UML) with a wealth of options.

In theory, theory and practice are the same, but in practice - they are not!

The course takes a very pragmatic approach.

No more long and boring theoretical academic introductions, no more naive examples with no relevance to real life, and no more long educated argumentation about delicate nuances that don't really matter in real life.

Right from the start, I will introduce a real-world test case. This test case will accompany us throughout the course. In every lecture I will add more details that will reflect the complexity of real test case and will set the stage for adding more concepts and "wisdom" to the class model.

We will conclude the course with a very accurate (and elegant) class model that will reflect completely our complex business domain.

Since building a class model is quite a challenging mission, I will teach you how to work with CASE tools (Computer Aided System Engineering).

From the beginning, all your work will be done with leading CASE software, which is been used by real system analysts in real projects.

We will learn and practice:

  • Classes and objects

  • UML (the Unified Modeling Language) - what it is, why it's so crucial to the analysis process

  • The association relationship

  • CASE tools - Why, what and how to use it

  • How to enhance our test case

  • Constraints

  • Recursion

  • The association class

  • The inheritance relationship

  • Refining attributes

  • The data def stereotype

  • The Enum stereotype

  • The composition relationship

  • Managing historical data

Since I believe in hard work, you need to practice, practice and then practice again.

In the supplementary section of the course, you will find more test cases from various business domain. You are highly recommended to use it!

My name is Yosi Wiesel. I have a passion for information systems. I have a passion for the magical journey, when we take some abstract, vague idea, and realizing it to a real working software system.

And I have a passion to share with you my knowledge and insights.

Let's start!

Have fun and productive studies!

Who this course is for:
  • Anyone that wants to master the digital product management process
  • Anyone who wants to learn how System Analysis starts a project
  • Anyone who wants to understand and practically build the Class model
  • Experienced Programmers who want to understand how the Class model is born
  • Students in System Analysis course who wants to deepen their knowledge about class model
  • Students that don't like tedious theory, rather prefer test cases practice
Course content
Expand all 23 lectures 02:00:42
+ The basics - Classes, Objects and Associations
4 lectures 29:33

Modeling the Chaos !!

This is what the course is about.

Preview 03:04

Many times the business domain seems to be very simple and misleads us that the problem is trivial.

Nothing can be more wrong!

In order to challenge this perception, I will introduce our test case. I will describe, in simple statements, a typical university: Students, courses, instructor, syllabus, grades.

A deep investigation will approve that nothing is simple as it looks.

We, therefore, need a structured and solid approach to understand and analyze our domain.

This will be the class model

I will introduce the class and object concepts. The cornerstones to the Class model.

Classes and Objects

Classes don't not stand alone.

After discovering the main classes in our model, we start investigating the relationships between them.

Clear understanding of classes relationships is of great challenge to the system analyst. Poor understating might result in major flaws in the information system.

There are 3 kinds if relationships between classes .

In this lecture we introduce the association relationships, and immediately implement  this concept on our test case.

Associations and multiplicity

Having introduced the association relationship, we can now leverage the concept and improve our model.

Doing so will result in a more accurate and clear model, that represents in a very elegant way the essence of our business model.

At this point we realize that we need urgently a computerized tool to build our models.

We introduce the concept of CASE tools - Computer Aided System Engineering.

From this point you will be able to build your models with dedicated software, instead of pen and paper (or PowerPoint).

More about Associations, CASE tools
+ Practical guide to CASE tool
2 lectures 12:37

We will learn how to start working with our CASE tool.

We'll start with the basics:

  • Building classes and their attributes

  • Associating classes with direction and multiplicity

CASE Part 1 - start

We will learn how to document our model.

We will learn how to:

  • Document the diagram

  • Document the class

  • Document the class attributes

  • Add a diagram info box to the model

  • export our model to acrobat (PDF) file

CASE Part 2 - documenting the model
+ Advanced features of the Class model
5 lectures 24:46

In some cases, the UML fails to be able to represent some delicate, yet critical, issues of the business domain.

We will introduce the idea of constraint, that provides a nice and flexible answer for such  limitations.

Adding Constraints to the class model

Recursion is an elegant implementation of association, where we discover relationships between objects of the same class.

The Association Class
The Inheritance relationship
+ Practical guide to CASE tool - continue
2 lectures 10:46

We will learn how to add advanced features to our class model.

We will learn how to:

  • Define Constraints

  • Build a recursive association

  • Build an association class

CASE part 3 - Constraints, Recursion and Association class

We will learn how to build sub class for a its super class.

CASE part 4 - Inheritance
+ Enhancing the class model
4 lectures 23:07

We introduce some more features to further refine the attributes of a class:

  • Attribute multiplicity

  • Derived attribute

  • Unique constraint

  • Default value

These features further improve  our ability to build an accurate model of the business domain.

Refining attributes

We introduce the concept of stereotyping classes.

We then use two UML predefined stereotypes:

  • <<Data def>>

  • << Enum >>

We explain the idea in these stereotypes, and implement them in our test case.

Preview 11:38

We explain the relationship of "is part a" which is the composition relationship.

The Composition relationship
Managing Historical Information
+ Practical guide to CASE tool - continue
3 lectures 16:42

We will learn how to enhance our model.

We will learn how to:

  • define attribute multiplicity

  • define derived attribute

  • add unique constraint to an attribute

  • define a default value for attribute

CASE part 5 Attribute multiplicity, Derived attribute, Unique , Default value

We will learn how to define special ("stereotype") class.

We will learn how to:

  • build a <<Data def>> class and define an attribute based on it

  • build an <<Enum>> class and define an attribute based on in

CASE part 6 - Type def and Enum stereotype classes

We will learn how to build a composition relationship between two classes.

CASE part 7 - The composition relationship
+ Epilogue. What next ? More missions ...
1 lecture 02:49
The end of the course. And - more missions ...
+ Supplementary test cases
1 lecture 00:19

Below is a description of a business domain.

This description is written deliberately on a “free” format. It reflects the way the domain expert describes his business domain: Sometimes it’s a little blur, sometimes not so accurate, sometimes with inner contradictions, but always authentic…

Whenever needed, and as long as not been specified otherwise, you may wish any business assumptions you want, as long as they make sense.

Your challenge is to understand it, analyze it, and build a clear-cut Class Model.

Supplementary Test Cases
+ Appendix - The complete Class model of the University
1 lecture 00:02

Open your CASE tool and explore the complete model

The complete Class model of the University test case