  The experimental measures of the multiplicity derivatives, the moment
parameters, the bimodal parameter, the fluctuation of maximum fragment charge
number (NVZ), the Fisher exponent ($\tau$) and Zipf's law parameter ($\xi$),
are examined to search for the liquid-gas phase transition in nuclear
multifragmention processes within the framework of the statistical
multifragmentation model (SMM). The sensitivities of these measures are
studied. All these measures predict a critical signature at or near to the
critical point both for the primary and secondary fragments. Among these
measures, the total multiplicity derivative and the NVZ provide accurate
measures for the critical point from the final cold fragments as well as the
primary fragments. The present study will provide a guide for future
experiments and analyses in the study of nuclear liquid-gas phase transition.
