Nuclear & Critical Infrastructure Manufacturing calculator
Safety-Class Inspection Cost Calculator
Price an inspection plan for safety-class components from the population, the per-inspection cost, the coverage share and fixed qualification cost. The result keeps the population and inspected bases apart so fixed cost is never spread over the wrong denominator.
What this calculator does
- Total inspection cost for a safety-class population, split into variable inspection and fixed qualification, with both per-component bases.
Formula used
- Components inspected = components to inspect × inspection coverage share ÷ 100
- Variable inspection cost = components to inspect × cost per inspection × inspection coverage share ÷ 100
- Total inspection cost = variable inspection cost + fixed inspection and qualification cost
- Inspection cost per component = total inspection cost ÷ components to inspect, blank at zero
- Inspection cost per inspected component = total inspection cost ÷ components inspected, blank at zero
Inputs explained
- Components to Inspect: Safety-class components in the inspection population.
- Cost per Inspection: Blended cost of one inspection or examination.
- Inspection Coverage Share: Share of the population the plan inspects.
- Fixed Inspection and Qualification Cost: Qualification, setup and reporting cost for the lot.
How to use the result
- Best suited to pricing the inspection line in a bid, comparing sampling against full coverage, budgeting fixed qualification cost.
- Mixed methods with very different per-part costs need separate runs. A failed inspection that triggers rework or reinspection is not modeled.
Common questions
- Why show two cost per component figures? The population basis spreads the fixed cost over every component you are buying, while the inspected basis spreads it over only the ones examined. Quotes for the lot use the first; the second shows the cost of one inspected part.
- Does total cost rise with coverage? Yes. More coverage means more examinations at the per inspection cost, so the variable part grows while the fixed qualification cost stays the same. At 100 percent coverage the variable cost reaches its ceiling.
- What is the fixed inspection and qualification cost? Procedure qualification, equipment calibration, examiner preparation and reporting that are incurred once for the lot regardless of how many parts are examined. Pull it from quotes or your qualification records.
- What happens at zero coverage? Variable cost and components inspected fall to zero, while the fixed qualification cost remains because procedures and setup are still needed for the plan. Per inspected component is blank because nothing was examined.
Last reviewed 2026-10-01.