The work to be carried out for the development of this statistical operation varies according to two types of units, those subject to a restrictive budget and public accounting, and those subject to the General Business Accounting Plan (private). In the first group, the allocation of the expenditure of these units to the different COFOG groups is based on the development of the expenditure operations in accordance with the methodology established in the ESA, based on the economic classification of the expenditure budget. The functional and programme structure of the budget indicates the objectives and objectives to be achieved with the budgetary resources allocated to the expenditure management centres. The expenditure programmes of the Budget Liquidations are analysed individually in order to ascertain their purpose, for allocation to the relevant COFOG group.
In the case of units subject to the General Business Accounting Plan, the functional classification is carried out on the basis of their main activity, as defined in their statutes and memoirs. However, in units carrying out several clearly differentiated activities (e.g. in the case of public enterprises promoting public infrastructure both in education and in transport), the allocation of expenditure to different COFOG groups is carried out as deducted from the information contained in the reports.
Finally, the unit of counterpart of expenditure in interest transactions, current transfers and capital transfers is analysed, so that in sector S.13 each transaction is the sum of the data for each subsector, except for those transactions that are consolidated between subsectors.