  The physics impact of a staged approach for double-beta decay experiments
based on Ge-76 is studied. The scenario considered relies on realistic time
schedules envisioned by the GERDA and the MAJORANA collaborations, which are
jointly working towards the realization of a future larger scale Ge-76
experiment. Intermediate stages of the experiments are conceived to perform
quasi background-free measurements, and different data sets can be reliably
combined to maximize the physics outcome. The sensitivity for such a global
analysis is presented, with focus on how neutrino flavor models can be probed
already with preliminary phases of the experiments. The synergy between theory
and experiment yields strong benefits for both sides: the model predictions can
be used to sensibly plan the experimental stages, and results from intermediate
stages can be used to constrain whole groups of theoretical scenarios. This
strategy clearly generates added value to the experimental efforts, while at
the same time it allows to achieve valuable physics results as early as
possible.
