The Book discusses the major analytical methods in general which are used for the analysis in chemical and pharmaceutical industries.In addition the book elabortaes the first HPLC method for the simultaneous estimation of Phenylephrine Hydrocholride, Lignocaine Hydrochloride and Betamethasone Valerate in a pharmaceutical ointment, which is reliable accurate and easy thus can be applied to these combination in any dosage form with little modifications as per dosage.There has not been any other method which describes the simultaneous estimation of the same till date. In addition the book describes the different parameters which are required during the method development and the process of going through the various stages of the method development for the estimation of the active pharmaceutical ingredients like selection of the Mobile phases, lambda maximum, precision, accuracy, robustness, ruggedness, LOD, LOQ etc. The book will be highly useful in the Pharmaceutical Industry.