The greatest concern resulting from the lack of severity criteria in incident classification is that escalation procedures will be ineffective because they rely on severity criteria to determine when and how to escalate an incident to higher levels of authority or responsibility, and what actions or resources are required for resolving an incident. Statistical reports will be incorrect is not a great concern because they do not affect the incident response process directly, but rather provide information or analysis for improvement or evaluation purposes. The service desk will be staffed incorrectly is not a great concern because it does not affect the incident response process directly, but rather affects the availability or efficiency of one of its components. Timely detection of attacks will be impossible is not a great concern because it does not depend on severity criteria, but rather on monitoring and alerting mechanisms. Reference: https://www.isaca.org/resources/isaca-journal/issues/2017/volume-5/incident-response-lessons-learned https://www.isaca.org/resources/isaca-journal/issues/2018/volume-3/incident-response-lessons-learned