When should corrective measures be implemented in mission-critical systems?

Implementing corrective measures after a disruption has occurred is crucial in mission-critical systems because it allows organizations to address and resolve issues that directly affect operations. This proactive response helps prevent further damage and minimizes downtime, ensuring that services can be restored promptly and efficiently.

In mission-critical contexts, waiting until an issue arises means that the organization is in a reactive state, where the priority shifts to restoration and recovery rather than prevention. The primary focus is on stabilizing the system and implementing fixes to bring operations back to normal.

While it's always preferable to anticipate and prevent problems beforehand, operational realities often necessitate immediate corrective actions post-disruption. This approach helps organizations learn from incidents and subsequently enhances their contingency strategies for future incidents.

The other options, such as implementing measures before issues arise or only during business hours, emphasize a predetermined schedule or limitations that may not align with the urgent nature of mission-critical systems. Additionally, leaving corrective measures to the discretion of the IT manager may introduce delays based on the individual’s judgment rather than an established protocol for swift action.