Measures should be in place to deal with a loss of service at any level, from national grid loss to a single socket, through business continuity plans (HBN 00-07). A framework for communicating and responding to failures should exist, and trained staff should investigate incidents and restore systems at the earliest opportunity. All staff should be able to raise failures immediately and get assurance that action is under way, for example through dedicated 24/7 phone numbers, and responders should understand patient and staff risks, the network and available resources.
The graph holds this control, the 0 it maps to, and the evidence behind each claim, over MCP and REST.