Product Lifecycle Management, PLM, is the process of managing the entire lifecycle of a product from its conception, through design and manufacture, to service and disposal. It is one of the four cornerstones of a corporation's information technology structure. All companies need to manage communications and information with their customers (CRM customer Relationship Management) and their suppliers (SCM-Supply Chain Management) and the resources within the enterprise (ERP-Enterprise Resource Planning). In addition, manufacturing engineering companies must also develop, describe, manage and communicate information about their products (PLM).