Different stages of the calibration process. Once the sequence of calibration problems to resolve is defined, the calibration process starts. At each iteration, the search space is defined depending on whether parameters have already been calibrated to preserve consistency between the different steps. Calibration stages are highlighted in red and those concerning the determination of the search space are highlighted in blue. At each iteration, u_q refers to the integer labeling the subgroup of parameters that will be re-estimated in the current iteration. N_G refers to the number of calibration subproblems. The process stops when all calibration subproblems are solved.