A method of determining a fill sufficiency or a dosage fill level or a dosage fill rate in a test strip for performing a measurement on a biological fluid; comprising: providing a biological fluid test strip comprising: a capillary fill chamber extending a length along the test strip, from an intake opening to a terminus; a measurement zone in the chamber positioned intermediate the opening and the terminus; characterized by at least two dose sufficiency electrodes in operative communication with the chamber the electrodes positioned intermediate the measurement zone and the terminus; the at least two dose sufficiency electrodes positioned to define a gap between one another; applying the biological fluid to the test strip to the intake opening effective to cause the fluid to flow toward the terminus, whereby the chamber is filled; applying a test signal, having an AC component to one of the dose sufficiency electrodes, and - detecting a response or an absence to the test signal at the other of the dose sufficiency electrodes to indicate the fill sufficiency of the biological fluid, or - measuring a response to the test signal at the other of the dose sufficiency electrodes, and determining the dosage fill level of the biological fluid based upon the response wherein the response varies in relation to the fill level or - measuring a first response to the signal at the other of the dose sufficiency electrodes at a first time, measuring a second response to the signal at the other of the dose sufficiency electrodes at a second time; and determining the rate at which the biological fluid fills the chamber based at least in part upon the first response and the second response. a capillary fill chamber extending a length along the test strip, from an intake opening to a terminus; a measurement zone in the chamber positioned intermediate the opening and the terminus; characterized by at least two dose sufficiency electrodes in operative communication with the chamber the electrodes positioned intermediate the measurement zone and the terminus; the at least two dose sufficiency electrodes positioned to define a gap between one another; applying the biological fluid to the test strip to the intake opening effective to cause the fluid to flow toward the terminus, whereby the chamber is filled; applying a test signal, having an AC component to one of the dose sufficiency electrodes, and - detecting a response or an absence to the test signal at the other of the dose sufficiency electrodes to indicate the fill sufficiency of the biological fluid, or - measuring a response to the test signal at the other of the dose sufficiency electrodes, and determining the dosage fill level of the biological fluid based upon the response wherein the response varies in relation to the fill level or - measuring a first response to the signal at the other of the dose sufficiency electrodes at a first time, measuring a second response to the signal at the other of the dose sufficiency electrodes at a second time; and determining the rate at which the biological fluid fills the chamber based at least in part upon the first response and the second response. - detecting a response or an absence to the test signal at the other of the dose sufficiency electrodes to indicate the fill sufficiency of the biological fluid, or - measuring a response to the test signal at the other of the dose sufficiency electrodes, and determining the dosage fill level of the biological fluid based upon the response wherein the response varies in relation to the fill level or - measuring a first response to the signal at the other of the dose sufficiency electrodes at a first time, measuring a second response to the signal at the other of the dose sufficiency electrodes at a second time; and determining the rate at which the biological fluid fills the chamber based at least in part upon the first response and the second response. <EOS>