FMI and SSP are interface standards for exchanging simulation models between heterogeneous tools.SmartSE project of the prostep ivip Association is studying the Credible Simulation Process Framework for reliable system development through simulation-based decision making which utilizes FMI and SSP. JAMBE (Japan Automotive Model-Based Engineering center) has developed interface guidelines for simulation model exchange between multiple companies while utilizing SmartSE recommendations. It also publishes reference models for vehicle system simulation of HEVs and EVs.These new standards and design methodologies continue to be demonstrated by JAMBE working activities and are increasingly recognized by Japanese automotive industry as providing a reliable and effective way for cross-team/cross-company co-development. This presentation also introduces the model exchange and co-simulation environment built on cloud server and show example use cases of simulation-based decision making using SmartSE and JAMBE standards, as well as FMI and SSP standards.