  We present a detailed description of the special procedures for calibration
and quality assurance of Atacama Large Millimeter/submillimeter Array (ALMA)
observations in Very Long Baseline Interferometry (VLBI) mode. These procedures
are required to turn the phased ALMA array into a fully calibrated VLBI
station. As an illustration of these methodologies, we present
full-polarization observations carried out with ALMA as a phased array at 3mm
(Band 3) and 1.3mm (Band 6) as part of Cycle-4. These are the first VLBI
science observations conducted with ALMA and were obtained during a 2017 VLBI
campaign in concert with other telescopes worldwide as part of the Global
mm-VLBI Array (GMVA, April 1-3) and the Event Horizon Telescope (EHT, April
5-11) in ALMA Bands 3 and 6, respectively.
