A method of transitioning a plurality of electrochromic windows at substantially matching tint rates, in a system comprising the plurality of electrochromic windows configured to receive a driving voltage or driving current and a network controller or a group of window controllers to perform the method, the method comprising: (a) determining a transition time, being the time required for the plurality of electrochromic windows to be transitioned from a starting optical state to a desired ending optical state, wherein the transition time is based, at least in part, on a minimum time required for a slowest transitioning window amongst the plurality of electrochromic windows to transition from the starting optical state to the desired ending optical state, and is determined based on predetermined values for each window or based on analysis of electrical feedback from each window; and (b) applying one or more drive conditions to each of the plurality of electrochromic windows , wherein the one or more drive conditions include a drive voltage or drive current sufficient to cause a respective window to transition from a starting optical state to the desired ending optical state substantially within the determined transition time, wherein applying the one or more drive conditions comprises: (i) probing the plurality of electrochromic windows to determine an electrical response for each window, (ii) analyzing the electrical response determined for the plurality of electrochromic windows , and (iii) based on the analysis, adjusting the one or more drive conditions by scaling the drive voltage or drive current applied to each of the plurality of electrochromic windows to thereby match the tint rates within the plurality of electrochromic windows . (a) determining a transition time, being the time required for the plurality of electrochromic windows to be transitioned from a starting optical state to a desired ending optical state, wherein the transition time is based, at least in part, on a minimum time required for a slowest transitioning window amongst the plurality of electrochromic windows to transition from the starting optical state to the desired ending optical state, and is determined based on predetermined values for each window or based on analysis of electrical feedback from each window; and (b) applying one or more drive conditions to each of the plurality of electrochromic windows , wherein the one or more drive conditions include a drive voltage or drive current sufficient to cause a respective window to transition from a starting optical state to the desired ending optical state substantially within the determined transition time, wherein applying the one or more drive conditions comprises: (i) probing the plurality of electrochromic windows to determine an electrical response for each window, (ii) analyzing the electrical response determined for the plurality of electrochromic windows , and (iii) based on the analysis, adjusting the one or more drive conditions by scaling the drive voltage or drive current applied to each of the plurality of electrochromic windows to thereby match the tint rates within the plurality of electrochromic windows . (i) probing the plurality of electrochromic windows to determine an electrical response for each window, (ii) analyzing the electrical response determined for the plurality of electrochromic windows , and (iii) based on the analysis, adjusting the one or more drive conditions by scaling the drive voltage or drive current applied to each of the plurality of electrochromic windows to thereby match the tint rates within the plurality of electrochromic windows . <EOS>