Several reference models have been developed in order to support the modernisation of official statistics: the Generic Activity Model for Statistical Organisations (GAMSO), the Generic Statistical Business Process Model (GSBPM), the Generic Statistical Information Model (GSIM), and a Common Statistical Production Architecture (CSPA). These reference models are maintained by the UNECE and endorsed by the High Level Group for the Modernisation of Official Statistics (HLG-MOS). The paper reports on the implementation of the models in different countries, the benefits and challenges faced in this process. It discusses the need for an integrated view of the modernisation models as a tool to overcome some of the difficulties experimented by countires. Finally, it presents new activities that the Supporting Standards Group will undertake in 2019 in order to facilitate the understanding of the interrelationships between different models and what benefits could be expected by implementing two or more models in a coordinated way.