In this paper, a novel test structure consisting of an array of non-addressable 1T-1R RRAM memory cells with parallel connection of all memory elements is introduced. The test structure can be used as a powerful tool for process variation monitoring during a new process technology introduction and also for marginal cell populations detection during process maturity. The test structure is designed to measure RRAM parameters of interest based on a simple measurement methodology: from the transfer characteristic measured under the select transistor clamping bias, it is possible to obtain accurate information on the RRAM switching parameters as well as the ON/OFF resistance values.