  While the Atacama Large Millimeter/submillimeter Array (ALMA) is a uniquely
powerful telescope, its impact in certain fields of astrophysics has been
limited by observatory policies rather than the telescope's innate technical
capabilities. In particular, several observatory policies present challenges
for observations of variable, mobile, and/or transient sources --- collectively
referred to here as "time-domain" observations. In this whitepaper we identify
some of these policies, describe the scientific applications they impair, and
suggest changes that would increase ALMA's science impact in Cycle 6 and
beyond.
  Parties interested in time-domain science with ALMA are encouraged to join
the ALMA Time-domain Special Interest Group (ATSIG) by signing up for the ATSIG
mailing list at https://groups.google.com/group/alma-td-sig .
