Operation sequencing validation operational checks

Operational checks are normally presenting process control computer systems. These systems may contain code that is part of the master production record. At the system level, the purpose of operational checks is to execute algorithms, sequencing of operations, and safety-related functions as required in the applicable customer specification. Inspections and testing are fundamental processes to be performed during the validation of critical system sequences. In addition, an ongoing program must be established to frequently verify that critical operations occur in the proper sequence. 

In a standard procedural or object-oriented environment, sequencing is a key element in the validation of a computer system. Sequencing encompasses instruction to operators, operation/process sequencing, and Part 11-related operational checks. So, how are these systems to be tested Who will make sure that the calling sequence is correct ... 

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