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This part of the application and maintenance review consists of evaluating the standard operating procedures and the actual operating practices. Most production areas maintain some historical data that track its performance and practices. These records may consist of log books, reports, or computer data. These data should be reviewed to determine the actual production practices that are used to operate the machine or system being investigated.

This part of the evaluation should determine if the SOPs were understood and followed before and during the incident or event. The normal tendency of operators is to shortcut procedures, which is a common reason for many problems. In addition, unclear procedures lead to misunderstanding and misuse. Therefore, the investigation must fully evaluate the actual practices that the production team uses to operate the machine or system.