Data generated İroni vvood-product durability evaluatioııs can be difficult to interpret. Standard metlıods used to evaluate the potential loııg-term durability of vvood products often provide little guidance on interpretation of test results. Decisioııs on acceptable perform ance for standardization and code com pliance are based 011 the judgm ent of revievvers or com m ittees. This decision-m akiııg process has potential pitfalls, especially vvlıen tlıeı e is pressure to m inim ize the time needed for evaluation. This paper discusses som e of the pitfalls encountered in interpretation of in-ground and above-ground durability test data and suggests areas vvlıere more prescriptive perform ance criteria nıay be vvarranted.