"The term 'Flow' represents the activities that occur in a specific order as defined by the business. Alternate flow defines actions that occur separate from the basic flows and can also be thought of as an optional flow. Exception flow, on the other hand, is a process that is executed when errors are encountered. An example of an alternate flow is when a user opens a login page of a website, and there is a forgot password link. If entering the correct username and password results in a 404 error, it is an exception flow."
