  Quantum discord as a measure of the quantum correlations cannot be easily
computed for most of density operators. In this paper, we present a measure of
the total quantum correlations that is operationally simple and can be computed
effectively for an arbitrary mixed state of a multipartite system. The measure
is based on the coherence vector of the party whose quantumness is investigated
as well as the correlation matrix of this part with the remainder of the
system. Being able to detect the quantumness of multipartite systems, such as
detecting the quantum critical points in spin chains, alongside with the
computability characteristic of the measure, make it a useful indicator to be
exploited in the cases which are out of the scope of the other known measures.
