The IFEG also recognises that many buildings may appear to have similar or identical design features but on closer examination it has been found that minor variations can have a major influence on the fire safety of the buildings. Therefore, the IFEG recommends that when considering a performance-based building solution from a fire engineering point of view, every building, however similar, must be assessed individually and on this basis, the use of The Accessible Exit Sign Project designs must form part of a unique fire engineered solution when used.