step 1 : Delete the EXPERIMENT object in the prior chapter model by right clicking on the Experiment in the [Navigation] Panel.
We Will embellish the previous airport model to allow a choice of three different routes for passengers arriving at the airport. Passengers who need to check bags and get tickets an either check in at the curbside station or check in at the main station inside the airport while some can proceed directly to the security check point. Refer to Figure 3.1 which depicts the modified airline check-in process to be modeled.