Methods and apparatus are provided for optimising mitigation of an outage of a cell in a communications network. In one aspect, a method comprises determining an outage of the cell during a first time period. A time-variable parameter is determined that is indicative of predicted impact of the outage of the cell, the impact being predicted based on historical data for the cell in at least one earlier time period. One or more actions are performed in relation to the outage based on the time-variable parameter for said first time period.