Three of the targets - those concerned with disability, innovation and partnerships - require qualitative assessments of policy environments, and indicators for these are also under development. The greatest difficulty lies with those targets in Goals 3 and 4 which require further conceptual definition and agreement on indicators on which reliable and internationally comparable data can be gathered in a wide range of countries. Even where appropriate indicators have been agreed, the data sets available to national administrations and thereby to ITU vary in a number of respects.