---
title: "Tab: Summary/Messages"
slug: "tab-summarymessages"
tags: ["Circuits", "PEI"]
updated: 2026-10-27T23:11:45Z
published: 2026-10-27T23:11:45Z
canonical: "ims-handbook.cenosco.com/tab-summarymessages"
---

> ## 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.

# Tab: Summary/Messages

The **Summary/Messages** tab of the [Calculation Summary](/v414/docs/the-calculation-summary) summarizes the Next Inspection Date calculations.

For each CML/MP the [Remnant Life (RL)](/v414/docs/remnant-life-rl-and-next-inspection-date-nid-calculations) and [Next Inspection Date (NID)](/v414/docs/next-inspection-date-nid-horserace) are calculated.

For IMS Calculated and IMS Half life, the CML/MP with the [earliest NID is selected](/v414/docs/next-inspection-date-nid-horserace). This is the driving CML/MP. The IMS Calculated and IMS Half life rows show this driving CML/MP’s NID and corresponding Last Inspection Date (LID). Also the RL in years, the Rate (max CR), the Basis (which CR, e.g., [Short, Long](/v414/docs/long-short-and-baseline-readings), is driving) are shown.

The Time-Based NID is always looking at the LID of all the CMLs, plus a fixed time interval, based on the Inspection Reason (see [Creating new PEI Circuits](/v414/docs/creating-new-pei-circuits)). For this reason the LID of the Time-Based can differ from the LID of the IMS Calculated. Note: [Nominal](/v414/docs/long-short-and-baseline-readings) measurements are not considered as inspections and are thus not taken into account when the LID is determined.

The other columns in the table are:

- The Interval Factor (IF): For all rows, except IMS Half life, this is the Circuit IF. Depending on the Circuit’s IF Strategy, this will either be a user entered value or the RBI IF. For the IMS Half life an IF of 0.5 is always used.
- Maximum Inspection Interval (MII): MII = RL x TIF. (The TIF is determined from the Circuit IF as well as other factors – see [Tab: Corr Rates IF](/v414/docs/tab-corr-rates-if)). For Time-Based, the MII is a user entered, jurisdictional or calculated inspection interval (e.g. from RBI).
- Driving: This shows the Circuit – Sub-Circuit – CMLname – MPname of the driving CML/MP, i.e. the CML/MP with the earliest NID.

The Recommended NID is either the IMS Calculated or Time-Based NID, whichever is the earliest date. When [EVA](/v414/docs/eva-overview) is enabled, it can also be the EVA NID. The other NIDs (IMS Half life, Sugg CR Calculated, and IDAP) do not take part in the [horserace](/v414/docs/next-inspection-date-nid-horserace).

![](https://cdn.document360.io/e492a0e0-a4ba-4aca-8fc6-76b95f91fdf3/Images/Documentation/tab:-summary/messages-image-pyyva4h8.png?sv=2026-02-06&spr=https&st=2026-10-28T12%3A43%3A04Z&se=2026-10-28T13%3A43%3A04Z&sr=c&sp=r&sig=9xHXcl5L9OVyTiQhk9jo84wu%2Fij8Mo%2BmnZ%2FXAvkND6Y%3D)The Summary/Messages tab.

Row descriptions:

| Row | Description |
| --- | --- |
| IMS Calculated | Data based on the IMS CR calculations (Long CR, Short CR, Linear Regression CR, Suggested CR, Average Long-term CR, and Average Short-term CR). |
| IMS Half life | Same as above but with a fixed Interval Factor of 0.5. (not taking part in horserace). |
| Sugg CR Calc | Data only based on the Suggested CR. (not taking part in horserace). |
| IDAP | Data only based on the IDAP (DLM) estimated CR (see [Corrosion Rate Calculations – Details](/v414/docs/corrosion-rate-calculations-details)). Not used in the calculations to drive inspections, for display purposes only. (not taking part in horserace). |
| Time-Based | Determined from RBI, the User entered interval, or from Industry Codes (e.g. maximum interval for Vessel Corrosion Schedules is 10 years). |
| Recommended | It is either the Calculated or Time-Based Next Inspection Date: whichever is the earliest date. Time-Based will always be used if the Ignore Calc Interval checkbox on the Circuit Detail is checked (see [Remnant Life (RL) and Next Inspection Date (NID) Calculations](/v414/docs/remnant-life-rl-and-next-inspection-date-nid-calculations)). |
| Rgd Limit Req | Reading Limit Requirement (only for display purposes, converted from IDMS). |
| RBI Interval Factor | Interval Factor determined using SRBI. If the Circuit’s IF Strategy is set to “SRBI”, then this becomes the Circuit IF and thus is used in the CR calculations. |

## Reviewing Warnings

Warning relevant to the CR calculations are displayed on here. Take note of these and make changes if needed, e.g. remove outliers from your data (see [Data Quality (Identifying Anomalies)](/v414/docs/data-quality-identifying-anomalies)).

![Graphical user interface, application  Description automatically generated](https://cdn.document360.io/e492a0e0-a4ba-4aca-8fc6-76b95f91fdf3/Images/Documentation/tab:-summary/messages-image-fxe79203.png?sv=2026-02-06&spr=https&st=2026-10-28T12%3A43%3A04Z&se=2026-10-28T13%3A43%3A04Z&sr=c&sp=r&sig=9xHXcl5L9OVyTiQhk9jo84wu%2Fij8Mo%2BmnZ%2FXAvkND6Y%3D)Take note of warnings.