This book is addressed to the specialists, engaging in exploitation of the large informative systems built with the use of technological platform of BAS, : Enterprise", and is a set of methodologies and approaches on providing of technological quality of the informative systems. For preparation of materials practical experience of commands of exploitation of the large informative systems is used on the projects of Centers of competense on technological questions of firm of " BAS" (ЦКТП).In a book there is theoretical information about organization of exploitation and practical methods are described, an analysis over of tuning of different components of the informative system is brought. In addition, BASe methodologies of localization and investigation of problems are described, examples of decision of the concrete applied tasks of exploitation are made. Authors tried to take into account the reviews of readers first editions of book, to complement and process material for forming of more integral picture of process of exploitation. To this edition the examples of the practices of exploitation, used on the real large introductions, are also added.Recommended as methodical material at preparation to attestation of" BAS :Эксплуататор of the large informative systems".After a purchase additional possibility to get a book in is given format of ."