The paper deals with the use of UML approach for the specification of a PDM system. A PDM enables the management of the product data about its entire lifecycle. The main goal of the paper is to highlight the added value of in using an object-oriented approach to modelling and implementing a PDM in a business case study. The chosen object-oriented approach and the used UML diagrams for themodelling and integration of product, process, and resource data is detailed for a turboprop aircraft project.