Residual risk exceeds acceptable limits, because it indicates that the risk level is higher than the organization's risk appetite or tolerance, and that the risk responses and controls are insufficient or ineffective. Residual risk is the level of risk remaining in a process or procedure following the implementation of risk controls to limit or remove it. Escalation is a process that increases the awareness and involvement of higher-level stakeholders or authorities in a risk issue or situation. Escalation is appropriate when the risk issue or situation is outside the scope or authority of the current risk owner or manager, and requires the attention or action of the senior management or the board of directors. Residual risk exceeding acceptable limits is the best situation to justify escalation, as it implies that the current risk owner or manager cannot manage the risk within the predefined boundaries or expectations, and that the senior management or the board of directors need to intervene or approve the risk acceptance or transfer.
Residual risk being inadequately recorded, residual risk remaining after controls have been applied, and residual risk equaling current risk are all possible situations that may require escalation, but they are not the best situations, as they do not necessarily indicate that the risk level is higher than the acceptable limits, and that the senior management or the board of directors need to be involved.