How do you calculate an AMR traffic risk score?

Multiply the three ratings: severity x frequency x detection weakness. With severity 8, frequency 5, and detection weakness 4 on a calibrated scale, the calculator returns a risk score of 5.95 for that segment.

What is a good AMR traffic risk score?

There is no universal threshold because the score is relative. Rank all segments, then attack the top decile first. A common rule is to treat any segment with a high severity rating as a priority regardless of total score.

Why multiply instead of add the three factors?

Multiplication mirrors FMEA's risk priority number: a high score in one dimension, like a severe collision, should dominate even when the others are moderate. Adding would let a single dangerous factor get averaged away.

How is this different from a standard FMEA RPN?

It uses the same severity-occurrence-detection logic but frames occurrence as traffic conflict frequency and detection as the AMR system's ability to sense and stop, which is more concrete for fleet routing than generic process detection.

How should I score detection and stop-control weakness?

High scores mean the robot is unlikely to perceive a conflict and stop in time, due to blind corners, fast approach speeds, or sensor blind spots. Low scores mean strong LIDAR coverage, conservative speeds, and reliable right-of-way logic.

Can I compare scores across different facilities?

Only if both sites use the same rating anchors. Calibrate what a severity of 8 or a detection weakness of 4 means before comparing scores between buildings, or the numbers won't mean the same thing.

AMR, AGV & Intralogistics Automation calculator

AMR Traffic Risk Score Calculator

The AMR traffic risk score is an FMEA-style risk priority number adapted for autonomous mobile robot routes, multiplying how bad a collision would be, how often robots conflict at a point, and how poorly the system would detect or stop in time. Fleet safety leads and intralogistics engineers use it to triage route segments, blind intersections, and operating modes on one comparable scale instead of arguing from anecdotes. It turns 'that corner feels dangerous' into a number you can rank, track, and reduce. The point isn't precision; it's a defensible priority order for where to add sensors, speed limits, or traffic rules first.

What this calculator does

Score AMR traffic risk from safety or throughput impact, event frequency, and detection/control weakness.
a safety lead or automation engineer needs to prioritize AMR traffic controls before or after deployment
It multiplies collision impact severity, traffic conflict frequency, and detection/stop-control weakness into a single risk score for comparing AMR route segments and intersections.

Formula used

AMR traffic risk score = traffic impact severity × traffic event frequency × detection or control weakness score
Use the score to compare route segments, intersections, or operating modes on the same internal scale.

Inputs explained

Collision impact severity:
Traffic conflict frequency:
Detection and stop-control weakness:

How to use the result

Use it during route safety reviews, after near-miss reports, or when prioritizing where to spend a limited intersection-control or sensor budget.
The score is ordinal, not a probability; a 5.95 is only meaningful relative to other segments scored on the identical 1-10 scale, and it inherits any bias in your subjective ratings.

Current U.S. benchmarks

On-highway diesel averages $4.58 per gallon this week (EIA), trending down over recent periods. Truck tonnage is up 3.4% year over year (ATA via FRED).

Common questions

How do you calculate an AMR traffic risk score? Multiply the three ratings: severity x frequency x detection weakness. With severity 8, frequency 5, and detection weakness 4 on a calibrated scale, the calculator returns a risk score of 5.95 for that segment.
What is a good AMR traffic risk score? There is no universal threshold because the score is relative. Rank all segments, then attack the top decile first. A common rule is to treat any segment with a high severity rating as a priority regardless of total score.
Why multiply instead of add the three factors? Multiplication mirrors FMEA's risk priority number: a high score in one dimension, like a severe collision, should dominate even when the others are moderate. Adding would let a single dangerous factor get averaged away.
How is this different from a standard FMEA RPN? It uses the same severity-occurrence-detection logic but frames occurrence as traffic conflict frequency and detection as the AMR system's ability to sense and stop, which is more concrete for fleet routing than generic process detection.
How should I score detection and stop-control weakness? High scores mean the robot is unlikely to perceive a conflict and stop in time, due to blind corners, fast approach speeds, or sensor blind spots. Low scores mean strong LIDAR coverage, conservative speeds, and reliable right-of-way logic.

Last reviewed 2026-05-12.