How do you calculate an inspection risk priority number?

Multiply the severity, occurrence, and detection scores together. In the default, 6 severity, 4 occurrence, and 3 detection combine into the displayed risk score.

What is a high RPN for a surgical robotics inspection?

On a 10-point scale, RPNs above roughly 100 usually demand action, and any high-severity item (8-10) warrants review regardless of total. Keep a consistent scale so scores are comparable.

Why multiply the three scores instead of averaging?

Multiplication makes risk grow fast when all three are elevated — a hard-to-detect, frequent, severe escape is far worse than any single factor suggests, which averaging would hide.

What does the detection score mean?

Higher detection scores mean the defect is harder to catch at that inspection step. Poor detection on a safety-critical robotics feature is the classic reason a step becomes a risk bottleneck.

How do I lower an inspection bottleneck score?

You cannot easily change severity for a safety-critical feature, so attack occurrence with process control and detection with better fixtures, vision, or poka-yoke to bring the score down.

Severity vs detection — which matters more?

Severity reflects patient-harm consequence and should never be discounted; detection reflects how likely you are to catch the defect. Both feed the score, but severity should also trigger independent safety review.

Surgical Robotics Manufacturing calculator

Inspection Bottleneck Calculator

Inspection Bottleneck applies FMEA-style risk scoring to the quality gates that constrain a surgical robotics line, multiplying severity, occurrence, and detection into a single risk priority number. Quality engineers use it to rank which inspection steps most threaten patient safety and throughput, so scarce inspection capacity and poka-yoke effort go where they matter. In surgical robotics, an escaped defect on a drive gearbox or force sensor carries catastrophic severity, so detection weakness at a bottleneck inspection is a top-tier risk. This calculator gives you a defensible, comparable score to drive that prioritization.

What this calculator does

Estimate inspection bottleneck for surgical robotics manufacturing using production-ready inputs so teams can rank risks and decide which issue needs containment, controls, or escalation first.
Use it when inspection bottleneck in surgical robotics manufacturing needs a defensible ranking against other surgical robotics manufacturing risks for the next review.
It computes a risk priority number by multiplying severity, occurrence, and detection scores on a common scale.

Formula used

Inspection bottleneck risk score = inspection bottleneck severity score × inspection bottleneck occurrence score × inspection bottleneck detection score
Use the same scoring scale across comparable inspection bottleneck risks.

Inputs explained

Severity if a defect escapes inspection:
Occurrence rate of the inspection escape:
Detection difficulty at the inspection step:

How to use the result

Use it when ranking inspection steps for corrective action, capacity investment, or added detection controls.
RPN treats all three factors as equally weighted multipliers, so a high-severity, low-occurrence risk can score the same as a moderate one — always review severity independently for safety-critical items.

Current U.S. benchmarks

U.S. manufacturing runs at 75.6% of capacity with new factory orders at $657B per month (Federal Reserve and Census, May 2026).
Global copper trades at $13,484 per tonne (IMF via FRED, May 2026), up 41.5% in a year, and U.S. industrial electricity averages 8.66 cents per kWh. Both feed electrified-hardware unit economics.
The U.S. has 8,825 medical equipment and supplies establishments employing about 308,388 workers (Census County Business Patterns, 2023).

Common questions

How do you calculate an inspection risk priority number? Multiply the severity, occurrence, and detection scores together. In the default, 6 severity, 4 occurrence, and 3 detection combine into the displayed risk score.
What is a high RPN for a surgical robotics inspection? On a 10-point scale, RPNs above roughly 100 usually demand action, and any high-severity item (8-10) warrants review regardless of total. Keep a consistent scale so scores are comparable.
Why multiply the three scores instead of averaging? Multiplication makes risk grow fast when all three are elevated — a hard-to-detect, frequent, severe escape is far worse than any single factor suggests, which averaging would hide.
What does the detection score mean? Higher detection scores mean the defect is harder to catch at that inspection step. Poor detection on a safety-critical robotics feature is the classic reason a step becomes a risk bottleneck.
How do I lower an inspection bottleneck score? You cannot easily change severity for a safety-critical feature, so attack occurrence with process control and detection with better fixtures, vision, or poka-yoke to bring the score down.

Last reviewed 2026-05-12.