1. A method, comprising: receiving a set of data, the data indicating a plurality of performance measurements from a measurement point in a network, each of the plurality representing a single type of performance measurement made at the measurement point at each of a corresponding plurality of points in time; dividing the set of data into a plurality of data points in a chronological order, each data point having a value corresponding to the performance measurements; ranking the data points in an ascending order; calculating a cumulative sum for each of the data points; calculating a change score for the set of data points; and identifying a change point in the data set, if the change score exceeds a predetermined confidence level.