IBU gen­er­al­ly does not pro­vide eval­u­a­tions and rec­om­men­da­tions con­cern­ing indi­vid­ual prod­ucts, since build­ing prod­ucts are nor­mal­ly semi-fin­ished prod­ucts. Their effi­cien­cy and envi­ron­men­tal effects unfold only in inter­ac­tion with oth­er prod­ucts in spe­cif­ic instal­la­tion sit­u­a­tions. For this rea­son, build­ing prod­ucts are nei­ther “good” nor “bad”, and the key num­bers of the life cycle analy­sis in EPDs are nor­mal­ly not direct­ly com­pa­ra­ble. Eval­u­a­tion and com­par­i­son is only mean­ing­ful on the com­plete build­ing lev­el, not with indi­vid­ual products!