In this tutorial we are going to build a BPMN model for a bowling alley. A BPMN model is a business process. The diagram you make is based on a flowcharting technique. Decisions can also be made in a business process. These decisions are made thanks to the variables you put in your process. What we are going to build here is the process of bowling alley from reservation to check out and sending a discount email (if applicable). We start with a form to make the reservation and set the variables. What is shown in this tutorial are usertasks as well as public usertasks, a mailtask, servicetask, and DMN table.