Unless a facility has many nuclear devices, there is seldom one person whose only responsibility is the care of nuclear gauges. An employee who is responsible for nuclear gauges usually has other responsibilities. That person may be an environmental engineer, the chief electrical engineer, a production manager, or a safety engineer, having critical responsibilities in an expensive process. While all of the aspects of costs may not be explicitly represented in an analysis, a comprehensive analysis will at least acknowledge their existence. Only a range of costs is given, sometimes with a vaguely defined average.
Money has a value that changes over time.
The costs of incidents need to be stated with respect to an applicable time frame. Costs are often misstated from the view of a systematic analysis because of accounting practices. Accounting practices usually do well in keeping track of receipts and expenses by placing costs into conventional categories, avoiding subjective appraisals of value. But the categories may be inappropriate for a risk analysis. The constituents of the cost figures must be known.