---
title: "Guidance per DM - Summary"
slug: "guidance-per-degradation-mechanism-implementation-and-interpretation"
tags: ["PEI", "S-RBI"]
updated: 2026-10-27T23:11:45Z
published: 2026-10-27T23:11:45Z
canonical: "ims-handbook.cenosco.com/guidance-per-degradation-mechanism-implementation-and-interpretation"
---

> ## Documentation Index
> Fetch the complete documentation index at: https://ims-handbook.cenosco.com/llms.txt
> Use this file to discover all available pages before exploring further.

# Guidance per DM - Summary

> [!NOTE]
> This Section of the Handbook provides some guidance for specific Degradation Mechanisms used in IMS.
> 
> For more comprehensive Degradation Mechanism documentation, see: [Degradation Modules](/v414/docs/degradation-modules).
> 
> To view guidance related to Special Emphasis Components, see: [Guidance per Special Emphasis for Degradation Management with S-RBI](/v414/docs/guidance-per-special-emphasis-degradation-management).

There are some specific cases where the [S-RBI assessment approach](/v414/docs/work-process-degradation-management-implementation-steps), in IMS PEI, changes, depending on the Equipment/Component type or the Degradation Mechanism.

For some Degradation Mechanisms, specific modelling is implemented in IMS. A summary of the specific modelling parameters for some of those DMs is highlighted in the table below:

| RBI Methodology | Equipment Type | Component Type | Degradation Mechanism (DM) | DM characteristics | IF Table | Max Inspection Interval (MII) | Inspection Strategy (IS) |
| --- | --- | --- | --- | --- | --- | --- | --- |
| **Main** | ***** | ***** | ***** | **Age-Related** | **Half Life** | **RL*IF** | **-** |
| Main | * | * | [Creep](/v414/docs/creep-1) | Age-Related | Half Life | RL user entered, RL*IF | - |
| **Main** | ***** | ***** | ***** | **Non-Age-Related** | **-** | **-** | **NAR table** |
| Main | * | * | [HTHA](/v414/docs/high-temperature-hydrogen-attack) | Non-Age-Related | - | HTHA table | - |
| Main | * | * | [Slow Acting SCC](/v414/docs/stress-corrosion-cracking-mechanisms-without-specific-s-rbi-guidance) | Non-Age-Related | - | Slow Acting SCC table | SCC NAR table |
| Main | * | * | [Moderate Acting SCC](/v414/docs/stress-corrosion-cracking-mechanisms-without-specific-s-rbi-guidance) | Non-Age-Related | - | Moderate Acting SCC table | SCC NAR table |
| Main | * | * | [Fast Acting SCC](/v414/docs/stress-corrosion-cracking-mechanisms-without-specific-s-rbi-guidance) | Non-Age-Related | - | Fast Acting SCC table | SCC Fast NAR table |
| Main | * | * | Non-Corrosive | Non-Age-Related | - | RL*0.8 | Review only |
| Main | * | * | [CUI-CS](/v414/docs/corrosion-under-insulation) | Strategy Based | IF=1 | RL*1 | CUI CS table |
| Main | * | * | [CUI-SS](/v414/docs/corrosion-under-insulation-for-austenitic-and-duplex-stainless-steels) | Strategy Based | - | Based on slow Acting SCC table | CUI SS table |

Notes:

* Always applicable unless overwritten by another specific case.

- Not Applicable.