  The simultaneous detection of electromagnetic and gravitational waves from
the coalescence of two neutron stars (GW170817 and GRB170817A) has ushered in a
new era of "multi-messenger" astronomy, with electromagnetic detections
spanning from gamma to radio. This great opportunity for new scientific
investigations raises the issue of how the available multi-messenger tools can
best be integrated to constitute a powerful method to study the transient
universe in particular. To facilitate the classification of possible optical
counterparts to gravitational-wave events, it is important to optimize the
scheduling of observations and the filtering of transients, both key elements
of the follow-up process. In this work, we describe the existing workflow
whereby telescope networks such as GRANDMA and GROWTH are currently scheduled;
we then present modifications we have developed for the scheduling process
specifically, so as to face the relevant challenges that have appeared during
the latest observing run of Advanced LIGO and Advanced Virgo. We address issues
with scheduling more than one epoch for multiple fields within a skymap,
especially for large and disjointed localizations. This is done in two ways: by
optimizing the maximum number of fields that can be scheduled, and by splitting
up the lobes within the skymap by right ascension to be scheduled individually.
In addition, we implement the ability to take previously observed fields into
consideration when rescheduling. We show the improvements that these
modifications produce in making the search for optical counterparts more
efficient, and we point to areas needing further improvement.

High Energy Astrophysical Phenomena;General Relativity and Quantum Cosmology