* Experience and lessons learnt from the use of modelling techniques in onboard software development * Maturity of current methodology and tools in support of the model based software engineering (SysML, [HRT-]UML, OCL, assertions, AADL, SDL, SCADE, Matlab, etc.), and how to apply them to the onboard software development process * What is the new (model) life cycle and how does it impact current practices? * What is the current coverage of this process by supporting methodology and tools? * What is the added value of deploying fully or partly the MBSE process wrt the current practices for onboard software development? * What is blocking us from a wider use of model-based approaches? * What R&D actions are required to facilitate the adoption of such a process? * How to ensure model consistency along the life cycle of avionics and software? Is there a life cycle for models?