IBM has adopted a new metric to characterize the computational power of quantum systems: Quantum Volume.
I have a pleasure to recall that, Quantum Volume accounts for the number and quality of qubits, circuit connectivity, and error rates of operations. IBM’s prototype commercial processor offers a significant improvement in the Quantum Volume. Over the next few years, IBM aims to significantly increase the Quantum Volume of future systems by improving all aspects of the processors, including incorporating 50 or more qubits. Experts can learn more here: https://ibm.biz/BdiaQe.