4 edition of Using CRC cards found in the catalog.
Using CRC cards
Nancy M. Wilkinson
Includes bibliographical references.
|Statement||Nancy M. Wilkinson..|
|Series||Advances in object technology -- 6|
Using CRC Cards: ATM Case Study. These notes are based, in part, on material from chapters 3, 4, 5. and 6 of The CRC Card Book by David Bellin and Susan Suchman Simone (Addison Wesley, ). These notes discuss principles and techniques for design using CRC cards using a bank's Automated Teller Machine (ATM) as its example. A CRC cards is an index card that is use to represent the responsibilities of classes and the interaction between the classes. CRC cards are an informal approach to object oriented modeling. The cards are created through scenarios, based on the system requirements, that model the behavior of the system.
Overall design begins by using CRC cards to assign responsibilities to the various classes. The static structure of the design is summarized by means of an overall Class Diagram. Then the dynamic aspects of the design are developed, using State Charts for the major controller classes, plus an Interaction Diagram for each of the main use cases. Class-responsibility-collaboration (CRC) cards are a brainstorming tool used in the design of object-oriented software. They were originally proposed by Ward Cunningham and Kent Beck as a teaching tool, but are also popular among expert designers and recommended by extreme programming supporters. Martin Fowler has described CRC cards as a viable alternative to .
This text addresses the actual details involved with using CRC cards, including coverage of program code (Java, C++, and Smalltalk) derived from the use of the CRC card method. Rating: (not yet rated) 0 with reviews - Be the first. Introduction. Objects by Design is pleased to bring our readers this interview with Rebecca Wirfs-Brock, a well-known author and consultant in object-oriented software design and development. Her recent book, Object Design (Addison Wesley - November, ), is a nice blend of her insights into such topics as CRC Cards, Collaborations and Flexibility, the topics of our interview.
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The CRC Card Book covers the CRC method from start to finish, illustrating its application in three different in-depth case studies which supply tips and pointers drawn from real world experience. The case studies are presented in the engaging style of a novella to demonstrate how personalities and organizational culture come into play when Cited by: Using CRC Cards also provides a detailed look at how designs created with CRC cards can be mapped to an effective and efficient implementation in C++.
Software analysts, designers and developers will use this book to guide their transition to the object-oriented paradigm, as well as provide a process for development of their object-oriented Cited by: Nancy Wilkinson's book, Using CRC Cards, focuses specifically on the C++ programming community and likewise does not include any illustration of the team approach to class discovery.
The approach of The CRC Card Book is to cover the CRC method from start to finish, demonstrating its application in three different, detailed case-study examples. A Class Responsibility Collaborator (CRC) model (Beck & Cunningham ; Wilkinson ; Ambler ) is a collection of standard index cards that have been divided into three sections, as depicted in Figure 1.A class represents a collection of similar objects, a responsibility is something that a class knows or does, and a collaborator is another class that a class interacts with to.
CRC Cards for the Address Book Example. Responsibilities are assigned to the various classes based on the use of the model-view-controller design pattern.
The two entity classes (AddressBook and Person) serve as the model. The GUI class (AddressBookGUI) serves as the view. The controller class (AddressBookController) serves, of course, as the. Using CRC Cards is a comprehensive introduction to CRC (Class, Responsibility, Collaborator) cards.
It includes a description of the cards and how they can be used in interactive sessions to develop an object-oriented model of an application. In this book, the author draws on her years of project experience to describe how CRC cards can contribute at all stages of the software.
For a book on CRC cards that provides a clear introduction to object concepts and modeling, read "Using CRC Cards" by Nancy Wilkinson, published by. CRC cards (for Class, Responsibilities, Collaborators) are an activity bridging the worlds of role-playing games and object-oriented design.
With the intent of rapidly sketching several different ideas for the design of some feature of an object-oriented systems, two or more team members write down on index cards the names of the most salient classes involved in the feature. Furthermore, CRC cards can be used to develop a formal class diagram, if needed (something we will do later in this chapter).
Tables through show some sample CRC cards for the actual classes we will develop later in this book, to meet the requirements for the Timesheet List screen. Table Sample CRC Card for Timesheet Class. This book, first published inintroduces CRC (Class, Responsibility, Collaborator) cards with a description of the cards and how they can be used in interactive sessions to develop an The author describes how CRC cards can contribute at all stages of the software lifecycle.
Applying the object-oriented paradigm to the development of software requires individuals and teams to think and act differently than when designing procedural projects.
While proponents of the object paradigm often say identifying objects is a simple and intuitive process, experienced Price: $ The goal of a CRC sessionis to discover classes and convert them to CRC cards; Eash participant is responsible for holding, moving, and annotating one or more cards as messages fly around the system in support of a particular need or activity.
A Sample CRC Session. The problem. CRC Cards for ATM Example. Using CRC cards to assign responsibiities to various classes for the tasks required by the various use cases leads to the creation of the following cards. The following links can be used to go directly to the CRC cards for the various classes: Class ATM ; Boundary/entity objects - component parts of the ATM Class.
When using the CRC method, if you determine that a class cannot carry out a particular task by itself and needs the help of another class to complete the task, you should ____. - Do nothing on this class's CRC card. The task will be shown on the other class's CRC card.
- Add the other class onto this class's CRC card as a collaborator. In their book Object Design: roles, responsibilities, and collaborations published in Rebecca Wirfs-Brock & Alan McKean discuss CRC cards in some detail. They really emphasise the difference it makes to the whole procedure that this should be a very tactile experience and it loosens people's thinking to be passing round a physical object.
In ,CRC cards are used extensively in teaching and exploring early design ideas. CRC cards have become increasingly popular in recent years. As formal methods proliferate, CRC cards have become, for some projects,the simple low-risk alternative for doing object-oriented development.
16 THE CRC CARD SESSION. CRC cards are represented graphically and can be easily manipulated using the mouse and keyboard. The tool can generate design documents in MS Word and UML diagrams, which can be uploaded into. Book Borrower Fig A set of CRC-cards for modelling a simple library application.
2 Using CRC-Cards The CRC-card approach can be roughly divided into two stages; (1) development of an initial CRC-card model and (2) scenario de nition and roleplaying. In the roleplaying, participants.
user requirements. CRC modeling is an effective, low-tech method for developers and users to work closely together to identify and understand business requirements. Class Responsibility Collaborator Cards A CRC card (Beck & Cunningham, ; Ambler, ) is a standard index card that has been divided into three sections, as shown below in File Size: 73KB.
• In ,CRC cards are used extensively in teaching and exploring early design ideas. • CRC cards have become increasingly popular in recent years. As formal methods proliferate, CRC cards have become, for some projects,the simple low.
This concise book addresses the actual details involved with using CRC cards, including coverage of the team approach to analysis and examples of program code (Java, C++, and Smalltalk) derived from the use of the CRC card method.This book will explain the Object Oriented approach to programming and through the use of small exercises, for which feedback is provided, develop some practical skills as well.
At the end of the book one larger case study will be used to illustrate the application of the techniques/5(74).7. Maintenance and further development If using CRC cards for maintenance and product development it is an advantage if they are handled digitally, eventually integrated with the .