As for now after each collecting of phases it is necessary to re-define all combinations of load cases from different phases.
In most of cases repetition of collecting of phases is resulting from some modifications in single phases and necessity to re-calculate the model after it. After such modifications the new collecting is done for precisely the same list of phases.
In such case implementation of the update of collected phase (instead of generation of the new one) would simplify necessary users' action and result in very simple way to preserve in collected phase already defined combinations of load cases from different phases.
It is the feature which would significantly improve the usability of phase structures in modeling of sequential construction.
