Wat is Operational resilience, important business service, impact tolerance?

Operational resilience is a firm’s ability to prevent, adapt to, respond to, recover from and learn from operational disruptions. An important business service is a service the firm provides to clients or the market whose disruption could cause them intolerable harm or threaten the firm or market integrity; its impact tolerance is the maximum tolerable disruption to it, set by the firm, usually as a time.