Member States should take into account the fact that other policy measures may be carried out in the same time frame which may also have an impact on the amount of energy savings, so that not all changes observed since the introduction of a particular policy measure being evaluated can be attributed to that policy measure alone.
Ba cheart do na Ballstáit a chur san áireamh go bhféadfar bearta beartais eile a dhéanamh sa chreat ama céanna agus go bhféadfadh sé sin tionchar a bheith aige sin ar an méid coigiltis fuinnimh, ionas nach féidir na hathruithe go léir a tugadh faoi deara ón uair a tugadh isteach beart beartais ar leith atá á mheasúnú a chur i leith an bhirt beartais sin, agus i leith an bhirt sin amháin.