Though there has been a significant amount of work investigating the early stages of low-mass star formation inrecent years, the evolution of the mass assembly rate onto the central protostar remains largely unconstrained.Examining in depth the variation in this rate is critical to understanding the physics of star formation. Instabilitiesin the outer and inner circumstellar disk can lead to episodic outbursts. Observing these brightness variations atinfrared or submillimeter wavelengths constrains the current accretion models. The JCMT Transient Survey is athree-year project dedicated to studying the continuum variability of deeply embedded protostars in eight nearbystar-forming regions at a one-month cadence. We use the SCUBA-2 instrument to simultaneously observe theseregions at wavelengths of 450 and 850 μm. In this paper, we present the data reduction techniques, imagealignment procedures, and relative flux calibration methods for 850 μm data. We compare the properties andlocations of bright, compact emission sources fitted with Gaussians over time. Doing so, we achieve a spatialalignment of better than 1″ between the repeated observations and an uncertainty of 2%？3% in the relative peakbrightness of significant, localized emission. This combination of imaging performance is unprecedented inground-based, single-dish submillimeter observations. Finally, we identify a few sources that show possible andconfirmed brightness variations. These sources will be closely monitored and presented in further detail inadditional studies throughout the duration of the survey.