In today’s complex, fast moving, and highly competitive world, engineering simulation is providing a vital capability for organisations developing and delivering products. Indeed, simulation is helping engineers every day, to; investigate new concepts, introduce new technologies, iterate and mature designs to achieve targets, integrate systems, optimise performance cost and weight, manage complexity, ensure robustness to noise factors, and ensure quality and reliability. Engineering simulation is not only helping deliver great products, but it is also helping businesses to; deliver more great products to market, improve the efficiency of their development organisations by reducing failures and redesign, reduce cycle times to get to market faster, reduce dependency on physical test, reduce development manufacturing and product costs, reduce warranty and improve customer satisfaction. So, there is no question that engineering simulation is really important, but the contribution it makes to the business is not always recognised, or indeed measured. Engineering simulation can also use significant resources and budgets, so it is vital that organisations ensure it is effective and efficient. Achieving a fully effective and efficient engineering simulation capability depends on many elements working together in harmony and cannot be taken for granted. Indeed, it depends on process, methods, tools, models, data, organisation and compute infrastructure all being effective, efficient, and working together in balance. So how do businesses know if their capability is achieving this? Using a Maturity Assessment Framework can be a powerful tool for organisations to identify the status of the different elements of their simulation capability. The assessment enables improvement actions to be targeted to address specific maturity gaps and in-balance across the simulation capability. This presentation introduces a framework to measure maturity, and how to use this assessment to maximise the benefit achieved through simulation and build a strategy to deliver product and business goals.