What is Yourdon and Coad

Yourdon & Coad's Object-Oriented Analysis and Design (OOA/OOD) is an object-oriented method that precedes UML. Edraw contains special shapes and setting for creating Yourdon and Coad diagrams.

In Edraw Professional, the Yourdon and Coad Diagrams template and shapes are in the Software folder.

Edraw is a very easy-to-use and intuitive database design tool and Yourdon and Coad diagramming tool which can save you hundreds hours of work. Edraw is not only an excellent tool for database & ER Diagram, but also the one that allows you to reverse engineer already existing database structures, create detailed HTML or PDF reports.

Free Download Yourdon and Coad Software and View All Examples

Yourdon and Coad Symbols

This Edraw template, based on the Yourdon and Coad method, includes components for creating data-flow diagrams and also object state diagrams. Some unique attributes of their DFD notation include:

• A data store is represented as two parallel, horizontal lines.
• Processes are represented by a circle, and adorned with a double circle for multiple processes (indicating that further decomposition exists at a lower level). Note: the oval process should be reserved for object or class diagrams.

Class & Object - Objects and classes are abstractions of entities with exclusive services and attributes.
Whole-Part Relationships - Whole-part relationship refer to objects that contain one or more other objects. There are several types of whole-part relationships including: assembly-parts (airplane-wings), container-contents (cabinet-files), and collection-members (organization-members).
Generalization-Specialization (Gen-Spec) Relationships - Generalization-Specialization relationships refer to classes that inherit attributes and services from other classes. One class can inherit from multiple superclasses.
Connections - Connections illustrate the dependency of one object on the services or processing of another object.