This week, the PPI website project focuses on object-oriented techniques. Charlie can hardly wait to start creating system sequence, activity, and state machine diagrams based on the use cases created earlier. He is so excited that he cannot decide which diagram he will create first!

Suzanne feels she needs to better understand the process used to manage customer orders. She meets Charlie and suggests they create an activity diagram to document the process of a customer visiting the company website, selecting a product, and ordering it. Charlie agrees.

• You created an activity diagram in your Application Assignment 1. What are the things you think Charlie should keep in mind while creating this diagram?
• What are the things that Charlie should avoid?