ODI provided support to the Government of Tanzania task force who had been carrying out an initiative to incorporate different aid scenarios into the budget process, as a way of managing the unpredictability of future aid projections, and improve the alignment of aid and public expenditures to the Poverty Reduction Strategy. In the first stage, Tim Williamson reviews the preliminary outputs of the sector working groups and drafts recommendations on how the task force could design the next stages of scenario analysis preparation. The second stage reviews progress on the preparation of the scenarios and recommends how conclusions might be taken forward into budget preparations.