This standard describes a system for establishing and assessing cleaning quality. It is based on the general principles stipulated in EN 13549:2001.The standard describes two main principles: visual inspection, see Clause 4 and inspection using measuring instruments, see Annex D. For a certain cleaning task, it may be preferable to use either the former or the latter principle or a combination of both.The instrument measuring methods may work as a supplement for special types of premises used for e.g. the production of electronics, pharmaceuticals or food, or for premises housing laboratories, etc. where customers will stipulate special quality requirements