Fig. 2From: Method operable design region for robust RP-HPLC analysis of pioglitazone hydrochloride and teneligliptin hydrobromide hydrate: incorporating hybrid principles of white analytical chemistry and design of experimentsMinitab 18 software generated Ishikawa diagram showing the list of critical procedure variables and responses for the development of RP-HPLC method for estimation of PIO and THHBack to article page