title: Application of Cusum techniques to the routine monitoring of analytical performance in clinical laboratories.
abstract: Quality control data from a radioimmunoassay of progesterone are analysed. The measurements are found to have a lognormal distribution. A likelihood analysis of the change-point is described. Some rival continuous inspection schemes are compared and it is pointed out that more efficient schemes than Shewhart's can be implemented in clinical laboratories with the aid of a computer.
mesh_terms: D002624:Chemistry, Clinical; D003201:Computers; D006801:Humans; D011374:Progesterone / Q000032:analysis; D011786:Quality Control; D011863:Radioimmunoassay; D013223:Statistics as Topic
chemical_list: D011374:Progesterone