How do you calculate a compound moisture risk score?

Multiply the severity, occurrence, and detection ratings together. With severity 6, occurrence 4, and detection 3 the priority score comes out around 4.55 on this tool's scale — used to rank moisture failure modes against each other.

What is a good compound moisture risk score?

Lower is better. There is no universal threshold — set an action line for your program (say, anything in the top quartile of scored modes) and drive those down with drying or storage controls.

Why multiply the three ratings instead of adding them?

Multiplication makes a mode dangerous on all three axes rank far above one that is high on only one. A severe, frequent, hard-to-detect moisture defect should dominate — addition would flatten that.

What does a high detection rating mean here?

A high detection score means the moisture defect is hard to catch before it reaches product — no in-line moisture check, damage only visible after cure. Hard-to-detect moisture risks deserve extra prevention because you cannot rely on catching them.

How is this different from a general process FMEA?

It is the same severity-occurrence-detection logic, focused specifically on moisture-driven failure modes in compounding so you can compare wet-filler, humid-mixing, and storage risks head to head.

How do I act on the score once I have it?

Rank all your moisture failure modes by score, then attack the top ones. High occurrence points to material drying and sealed storage; high detection points to adding an in-line or incoming-moisture check.

Rubber, Tires, Foam & Elastomer Manufacturing calculator

Compound Moisture Risk Calculator

Compound moisture risk is an FMEA-style priority score for the ways trapped moisture ruins a rubber compound — porosity, blistering, poor cure, and bond failures traced back to wet fillers, hygroscopic ingredients, or humid mixing rooms. Compounding engineers and quality teams use it to rank moisture-related failure modes so scarce prevention effort goes to the risks that combine high severity, frequent occurrence, and poor detectability. Rather than treating every damp-material worry equally, the score forces a consistent comparison across risks on the same scale. It is a triage tool: the highest scores are where drying, sealed storage, or in-line moisture checks pay off first.

What this calculator does

Estimate compound moisture risk for rubber, tires, foam and elastomer manufacturing using production-ready inputs so teams can rank risks and decide which issue needs containment, controls, or escalation first.
Use it when compound moisture risk in rubber, tires, foam and elastomer manufacturing needs a defensible ranking against other rubber, tires, foam and elastomer manufacturing risks for the next review.
It multiplies severity, occurrence, and detection ratings into a single moisture-risk priority score for a given failure mode.

Formula used

Compound moisture risk score = compound moisture risk severity score × compound moisture risk occurrence score × compound moisture risk detection score
Use the same scoring scale across comparable compound moisture risk risks.

Inputs explained

Moisture defect severity rating:
Moisture ingress occurrence rating:
Moisture detection difficulty rating:

How to use the result

Use it when ranking moisture-related defect modes in a compounding FMEA or deciding which materials or steps get drying and moisture-control investment first.
The score is only as consistent as your rating scale; it is ordinal, so a score twice as high is not literally twice the risk, and identical scores can hide very different severity profiles.

Current U.S. benchmarks

The producer price index for plastic resins and materials stands at 319.371 (BLS, May 2026), up 19.5% from a year earlier. Quotes priced off last quarter's material cost miss this move.
U.S. light vehicles sell at a 16.9 million annual rate (BEA, Jun 2026), up 4.1% from a year earlier, the volume signal for automotive supply chains.
The U.S. has 11,391 plastics and rubber products establishments employing about 815,988 workers (Census County Business Patterns, 2023).

Common questions

How do you calculate a compound moisture risk score? Multiply the severity, occurrence, and detection ratings together. With severity 6, occurrence 4, and detection 3 the priority score comes out around 4.55 on this tool's scale — used to rank moisture failure modes against each other.
What is a good compound moisture risk score? Lower is better. There is no universal threshold — set an action line for your program (say, anything in the top quartile of scored modes) and drive those down with drying or storage controls.
Why multiply the three ratings instead of adding them? Multiplication makes a mode dangerous on all three axes rank far above one that is high on only one. A severe, frequent, hard-to-detect moisture defect should dominate — addition would flatten that.
What does a high detection rating mean here? A high detection score means the moisture defect is hard to catch before it reaches product — no in-line moisture check, damage only visible after cure. Hard-to-detect moisture risks deserve extra prevention because you cannot rely on catching them.
How is this different from a general process FMEA? It is the same severity-occurrence-detection logic, focused specifically on moisture-driven failure modes in compounding so you can compare wet-filler, humid-mixing, and storage risks head to head.

Last reviewed 2026-05-12.