Debtor countries are requested to submit a calendar of future disbursements, if available, at the time individual loans are first reported. Country authorities are in a better position to provide estimated disbursement schedules when there is a solid public sector investment program in place. In the absence of specific schedules, the RXD system projects disbursements by applying a set of profiles to the last actual undisbursed balance of individual loans. The profiles are derived under the assumption that specific sources of funds have some common characteristics that cause them to disburse, in the aggregate, in some observable pattern. Accordingly, some thirty profiles have been derived that roughly correspond to creditor type.
Profiles exist for concessional and nonconcessional loans from official creditors.
For multilateral lending, specific profiles are available for major international organizations. An estimating equation for each profile is derived by applying regression analysis techniques to a body of data that contains actual disbursement information for more than 100,000 loans. Although these standard profiles are reestimated from time to time, under the best scenario they can only approximate the disbursement pattern of any single loan. Most projections of future debt service payments generated by the RXD system are based on the repayment terms of the loans. Using the first and final payment dates and the frequency of the payments, the system calculates the stream of principal payments due.