IT: Resilience (Definitions)

"The ability to cope with adversity and recover quickly from setbacks." (PMI, "Navigating Complexity: A Practice Guide", 2014)

"System resilience is an ability of the system to withstand a major disruption within acceptable degradation parameters and to recover within an acceptable time." (Denis Čaleta, "Cyber Threats to Critical Infrastructure Protection: Public Private Aspects of Resilience", 2016)

"The ability of an information system to continue to (1) operate under adverse conditions or stress, even if in a degraded or debilitated state, while maintaining essential operational capabilities; and (2) recover to an effective operational posture in a time frame consistent with mission needs." (William Stallings, "Effective Cybersecurity: A Guide to Using Best Practices and Standards", 2018)

"The ability of a project to readily resume from unexpected events, threats or actions." (Phil Crosby, "Shaping Mega-Science Projects and Practical Steps for Success", 2019)

"The ability of an infrastructure to resist, respond and overcome adverse events" (Konstantinos Apostolou et al, "Business Continuity of Critical Infrastructures for Safety and Security Incidents", 2020)

"The word resilience refers to the ability to overcome critical moments and adapt after experiencing some unusual and unexpected situation. It also indicates return to normal." (José G Vargas-Hernández, "Urban Socio-Ecosystems Green Resilience", 2021)

"Adaptive capacity of an organisation in a complex and changing environment’ (ISO Guide 73:2009)

"The ability to resist failure or to recover quickly following a failure" (ITIL)

"The ability of an information system to continue to: (i) operate under adverse conditions or stress, even if in a degraded or debilitated state, while maintaining essential operational capabilities; and (ii) recover to an effective operational posture in a time frame consistent with mission needs." (NIST SP 800-39)

"The ability to prepare for and adapt to changing conditions and withstand and recover rapidly from disruptions. Resilience includes the ability to withstand and recover from deliberate attacks, accidents, or naturally occurring threats or incidents." (NIST SP 800-37)

"The ability to quickly adapt and recover from any known or unknown changes to the environment through holistic implementation of risk management, contingency, and continuity planning." (NIST SP 800-34 Rev. 1)