Resolution 2220 (2015) also encourages Member States to strengthen the collection of sex-disaggregated data to better understand the impact of small arms and light weapons on women. As part of the Review, a Global Study was launched on 14 October 2015. In the foreword, Phumzile Mlambo-Ngcuka, Executive Director of UN-Women, notes that the resolution was "one of the crowning achievements of the global women's movement and one of the most inspired decisions of the United Nations Security Council". It also notes that international courts and tribunals are dealing with sexual violence in more sophisticated ways.