Читать книгу Maintaining Mission Critical Systems in a 24/7 Environment - Peter M. Curtis - Страница 18

To assure reliable operation a Critical Environment Workflow and Change Management Process must be established and followed. Commensurate Roles and Responsibilities of the Engineering, Technology and Security groups will be developed, implemented, and adhered to in order to manage both planned and unplanned events and associated risks.

The Critical Environment (CE) is defined as the “physical space and the systems within a facility that are uniquely configured, sized and dedicated to supporting specific critical business operations as defined by the user”. There are many specific rooms and areas within facilities in today’s ever‐changing environment. Some are located within the buildings structure while others are located outside. Regardless of where a CE may be located, these locations have an immediate impact on the client’s ability to maintain business operations/continuity. Examples of some of these CE areas can be seen in Table 1.2.

Table 1.2 Critical Areas

Data Centers	Server Rooms
Operations Center	Business Continuity and Technology Recovery Rooms
Electrical Switchgear Rooms	Tape Silo and StorageTek Rooms
Network Equipment Rooms (NER)	Local Area Network (LAN) Rooms
Intermediate Distribution Frames (IDF)	Business Operations Control Rooms
Main Distribution Frames (MDF)	Uninterruptible Power Supply (UPS) Rooms
Main Equipment Rooms (MER)	Command Centers
Telecom Rooms (TR)	Chiller Rooms and Thermal Energy Storage Spaces
Switching and Hub Rooms	Building Management, Monitoring, and Automation Centers
Voice Telephone and Data Closets	Mechanical Equipment Rooms
Standby Emergency Power (SEP) Generator and Switchgear Rooms

Critical infrastructure systems are prevalent throughout a facility. Depending on the facility's size, there could be many redundant systems supporting the same critical environment. Knowing which systems that could impact the clients’ critical function/operation is paramount. Some of these systems are listed in Table 1.3.

Table 1.3 Critical Systems

Compressed Air Systems	Telephone and Fiber Optic Communications Systems
Utility Power Feeder Systems	Standby Emergency Power (SEP) Systems
Diesel Engine and Boiler Fuel Systems	Glycol Systems
Fire/Life Safety Systems	Environmental Control Systems (chillers, CRACs, etc.)
Natural Gas Supply Systems	Water Service Systems
Electrical Distribution and Grounding Systems	Building Management Systems (BMS)
Condenser Water Systems	Boilers
Uninterruptible Power Supply (UPS) Systems