  Over the next decade, observations conducted with ALMA and the SKA will
reveal the process of mass assembly and accretion onto young stars and will be
revolutionary for studies of star formation. Here we summarise the capabilities
of ALMA and discuss recent results from its early science observations. We then
review infrared and radio variability observations of both young low-mass and
high-mass stars. A time domain SKA radio continuum survey of star forming
regions is then outlined. This survey will produce radio light-curves for
hundreds of young sources, providing for the first time a systematic survey of
radio variability across the full range of stellar masses. These light-curves
will probe the magnetospheric interactions of young binary systems, the origins
of outflows, trace episodic accretion on the central sources and potentially
constrain the rotation rates of embedded sources.
