The presently disclosed subject matter provides a method of analyzing a plurality of cells of a cellular telecommunication network, the plurality of cells providing telecommunication services to a service area and being set with one or more cell configuration parameters enabling a cell rating for mobile stations in the service area. The method comprises selecting one or more cells among the plurality of cells; changing at least one cell configuration parameter of at least one of the plurality of cells during an intervention period in order to affect a rate of the selected cells in the cell rating for the mobile stations in the service area; monitoring traffic events communicated using the selected cells during the intervention period; and determining radio coverage contribution information of the selected cells by correlating the monitored traffic events and the change of cell configuration parameter.