You had better explain that one as well, Neil. PPG?
@Umish: if PM procedures are already perfect, why should they ever need changing? But (on the other hand), in a properly run biomed department (not so common as you may imagine, or hope for), each time a tech carries out a procedure, and finds it to be a load of *****, then he should get it sorted out (that is, corrected, improved ... whatever). Rocket Science?
