The size, complexity and heterogeneity of vehicular software systems has been constantly increasing. As a result, there is a growing consensus on the need to leverage modelbased techniques for automating, thus taming, error-proneness of tedious engineering tasks. Our methodology employs a one-tomany model transformation for generating a set of implementation models from a single design model. Then, it evaluates the appropriateness of each generated model by means of modelbased timing analysis. In this ongoing work, we discuss an enhancement of our methodology where model-based timing analysis is extended for running on a single model with uncertainty.