Benchmark solution ===================== It consists in comparing the different models, taking as reference the VISCOCHAB model integrated by RUNGE - KUTTA and a very fine step of time. Behavior VISCOCHAB is described in [:ref:`R5.03.12 `] (explicit and implicit integration). Behavior VISC_CIN2_MEMO is described in [:ref:`R5.03.04 `]. In particular, we will compare the maximum value of the constraints at the last cycle, as well as the variable :math:`q` relating to the memory effect.