03. Creating an Object Diagram

Let's pause for a moment and talk about how to create the object diagrams you've been seeing. We've broken this process into 3 steps: identify objects, relationships, and multiplicity.

Identifying Objects

If you've never created an object diagram from scratch, then it can be confounding the first time. However, making an object diagram should be a very natural process once you know how to identify objects. For many, you may already be identifying objects in everyday experiences and not even know it!

Relationships

The next step in building an object diagram is to describe the relationships between objects. How are objects connected? How do they work together to create the system you've described in the diagram?

Multiplicity

You've added objects to your diagram, and you've even connected the objects together with relationships. But, does your diagram give an indication of how many objects can be involved in a relationship? For instance, how many Maze Cells are in a Maze? One? Several? Many?