Design a process flow for this scenario: A customer lands on your website’s home

Design a process flow for this scenario: A customer lands on your website’s homepage, clicks on a product, views the details of the product, adds the items to the shopping cart, selects FedEx Priority Overnight for shipping, pays with Visa credit card, confirms the order, and finally submits the order. How do you measure the performance of your process in the spirit of continuous improvement?