schedule performance index per major item of the programme based on comparing budgeted cost of work performed with budgeted cost of work scheduled;
innéacs feidhmíochta sceidil in aghaidh mhórmhír an chláir bunaithe ar chostas buiséadaithe na hoibre a rinneadh a chur i gcomparáid le costas buiséadaithe na hoibre sceidealaithe.