Final answer:
Control deficiencies are classified into operation and design deficiencies, referring to failures in control execution and flaws in the control system, respectively.
Step-by-step explanation:
The classification of control deficiencies includes operation and design deficiencies. Operation deficiencies occur when a well-designed control does not operate as it should, possibly due to human error or failure of control execution. Design deficiencies happen when there is a flaw in the control system itself, meaning that even if the control operates as intended, the risk would not be sufficiently mitigated.
Although 'prevention' and 'material' could be related terms, they do not specifically classify control deficiencies. 'Prevention' pertains to strategies to stop control deficiencies from occurring, while 'material' could refer to the significance or impact of the deficiency.