In order to support SMEs in their modernization and competitiveness efforts, the authorities have put in place a support strategy through the various support programs led by the Ministry of Industry and Mines (ex- Ministry of Small and Medium-Sized Enterprises and Crafts) in collaboration with the European Commission, such as the Euro-SME Development Program (EDPME). In this context, this work was carried out in order to help clarify one of the upgrading programs carried out in Algeria. The aim is to discover the real situation of one of the family SMEs in Algeria. In this study, we adopted a qualitative approach focusing on the often intuitive management mode of the company. This study made it possible to make an inventory and a strategic diagnosis of the targeted family business and tries to shed light on the obstacles to the achievement of the overall objectives of the upgrading operations. This study made it possible to carry out an ex-post evaluation and reveal a set of obstacles to the development of Algerian family-owned SMEs. This publication aims to contribute to the capitalization of the experience of the upgrading programs in Algeria.