This « activity diagram» turns explicit the principles or management rules, describing the stream of activities operated from one originator event, in this case, the client’s demand going as far as the normal expected result, in this case the invoicing of the delivered order. This operational representation shows concretely in what way do the actors of an organisation intervene within the framework of the process described as to respond to one business event. The description of the process is therefore detailed into the different activities. Just as the image of the « processing for client demand, from order-taking to billing» another workflow could define the « processing for a client’s complaint, from complaint reception to settling the dispute », or even the « processing for order cancellation». At this point, the process appears as a body of « organized procedures » to be able to face every event.