In modern vehicles, the ongoing increase in capability, connectivity, and automation has led to a substantial rise in both the number and complexity of Electronic Control Units (ECUs). Balancing this growing complexity within strict cost, weight, and safety boundaries has become a major challenge for automotive manufacturers. Traditional document-based engineering approaches are no longer able to ensure consistency between requirements, design, and implementation, which motivates the use of more integrated and model-driven approaches capable of managing multidisciplinary trade-offs from the earliest phases of system development. The objective of this thesis is to develop and validate a framework for the preliminary design and optimization of automotive electronic architectures.