Disclaimer: 2023 GRESB Infrastructure Assessments
This document was prepared in response to industry feedback and discloses the detailed scoring methodology for all indicators of the 2023 Infrastructure Fund Assessment. The Scoring Document is shared for information purposes in an effort to increase transparency around the Assessment, Methodology and Scoring processes. GRESB reserves the right to make edits to this document during the scoring and analysis period preceding the 2023 results launch.
Introduction
This document outlines the scoring methodology of the 2023 Infrastructure Fund Assessment. It is shared for information purposes, to provide transparency on the Assessment, Methodology and Scoring processes.
How to read this document
This document provides a breakdown of how each indicator is scored in the 2023 GRESB Infrastructure Fund Assessment. We recommend reading it in conjunction with the Reference Guide, which includes the reporting requirements and validation details for indicators.
Please note the following:
- The overall scoring weight for each indicator is shown by the number of points at the bottom of each indicator.
- The breakdown of the scoring within each indicator is shown by the numbers and brackets in red (and blue) on the left side of each scored indicator.
- Values on the far left represent the fraction of the total indicator score apportioned to the respective indicator element. These values sum to one for each indicator.
- The square brackets "[" show a grouping of sub-elements within an indicator. The values within the square brackets represent the fraction of the element that is allocated to each sub-element.
- The Symbol "x" (outside or inside brackets) indicates use of a multiplier. A multiplier can take a value between zero and one and is multiplied by other fractional scores within the indicator or by the overall indicator. The details of the multiplier function are provided in the text at the bottom of each indicator.
- Blue brackets represent a ‘Diminishing Increase in Scoring’ approach being applied. This scoring methodology is described further below.
- The text below the indicator explains further how the scoring works.
Scoring Methodology
Following data validation, scoring is completed by an automatic system.
GRESB Score
The sum of the scores for all indicators adds up to a maximum of 100 points, therefore the overall GRESB Score - Infrastructure Fund is an absolute measure of ESG management and performance expressed as a percentage.
GRESB Score = Management Score + Performance Score

Management Score - Infrastructure Fund:
All participants that submit the Fund Assessment receive this score. The Component comprises 17 indicators and is scored out of 30.
Performance Score - Infrastructure Fund:
In order to receive a Performance Score - Infrastructure Fund, then at least 25% weight of underlying assets (based on equity invested), need to participate in the GRESB Asset Assessment. Once this threshold is met (and the assets have confirmed links and submitted assessments), then the entity receives a Performance Score - Infrastructure Fund. This score is a weighted average of the GRESB Score - Infrastructure Asset of all assets listed in the Summary of Entity Assets indicator (RC6), and is scored out of 70. If less than 25% of assets participate in the GRESB Asset Assessment, the fund will only receive a Management Score - Infrastructure Fund. Non-reporting assets, or assets without a 'Confirmed’ connection status, will receive a GRESB Score - Infrastructure Asset of zero for the purposes of calculating the Performance Score - Infrastructure Fund. The weights reported in the table should be equity based; so that the weight of an asset reported in the table, represents the equity invested in the asset divided by the total equity invested in all assets in the fund. Funds are entitled to exclude specific assets from contributing to the Performance Score - Infrastructure Fund if there is a valid reason (e.g. greenfield asset, operational - less than six months, recently purchased - purchased and owned for less than six months, or recently sold - sold prior to July 1st, 2023.
GRESB Rating
The GRESB Rating is an overall relative measure of ESG management and performance of the asset.
The calculation of the GRESB Rating is based on the GRESB Score and its quintile position relative to the GRESB universe, with annual calibration of the model. If the participant is placed in the top quintile, it will have a GRESB 5‑star rating; if it ranks in the bottom quintile, it will have a GRESB 1‑star rating, etc.
Scoring Weightings:
The Management component is made up of 6 Aspects and 23 indicators with the exclusion of Entity & Reporting Characteristics. The below weights apply for 2023

Indicator Scoring:
There are five scoring models used within indicators:
- One Section indicator - consisting of only Section 1 (Elements)
- One Section indicator - consisting of only Section 2 (Evidence) where the evidence provided is not validated and is for reporting purposes only.
- Two Section indicator (Evidence validated) - consisting of both Section 1 (Elements) & 2 (Evidence).
- Two Section indicator (Evidence not validated) - consisting of both Section 1 (Elements) & 2 (Evidence) where the evidence provided is not validated and is for reporting purposes only.
- Not scored
The overall outcome of these models is to generate a fractional score (i.e. between zero and one) which is then multiplied by the indicator weighting (maximum score) to generate the score for the indicator.
Section One (Elements)
Every scored indicator begins with this section which can receive a fractional score (i.e. between zero and one), determined by selections made in checkboxes and radio buttons, and answers provided in open text boxes. Based upon these inputs, fractional scores are calculated using either an aggregated points or a diminishing increase in scoring methodology.

Aggregated scoring: For indicators where one or more answers can be selected, fractional scores are awarded cumulatively for each individual selected answer and then aggregated to calculate a final fractional score for the section. In some cases, each checkbox answer may be equally weighted and in others, each checkbox answer may be assigned a higher or lower fractional score each, to reflect best practice responses. For many indicators, the final fractional score is capped at a maximum, which means that it is not necessary to select all checkbox answers in order to receive full points.
Diminishing increase in scoring: The idea behind this concept is that the fractional score achieved for each additional data point provided decreases as the number of provided data points increases. This means that the fractional score achieved for the first data point will be higher than the fractional score achieved for the second, which again will be higher than for the third, and so on.

If an indicator is a One Section indicator, the score calculated in this section will also be its final score.
Section 2 (Evidence)
Some indicators include an evidence section to verify information provided in section 1 (Elements). In these cases, the fractional score for the evidence section acts as a multiplier to the Section 1 fractional score. Mandatory evidence receives a multiplier of zero (0) for no evidence or not-accepted evidence, 0.5 for providing partially accepted evidence and 1 for providing fully accepted evidence. To clarify, the indicator will receive no points unless the hyperlink and/or uploaded document is considered valid (i.e. partially and/or fully accepted).
The final indicator score is then calculated as:
Indicator score = (Section 1 fractional score) X (Section 2 multiplier) X Indicator weighting
Example of indicator level scoring:
Example: LE5 indicator
Personnel ESG performance targets
Does the entity include ESG factors in the annual performance targets of personnel?
Does performance against these targets have predetermined consequences?
1
Select the personnel to whom these factors apply (multiple answers possible)
2⁄4
Dedicated staff on ESG issues
2⁄4
External managers or service providers
Non-financial consequences
1⁄2
Select the personnel to whom these factors apply (multiple answers possible)
2⁄4
Dedicated staff on ESG issues
2⁄4
External managers or service providers
Provide applicable evidence
×
Upload or URL____________
Indicate where in the evidence the relevant information can be found____
Provide additional context for the answer provided (not validated, for reporting purposes only)
________________________
1.65 points
,
G
This indicator is split into three sections represented by two fractions and an "x" in the far-left column. The first section addresses the predetermined financial consequences of performance targets and the employee group(s) to which they apply, and the second section covers the non-financial consequences.The final section allows for scoring of evidence. The far-left column tells us that the score for the indicator is calculated as follows; (where the section and evidence scores are all fractions between 0 and 1):
Indicator score = (Employee groups with financial consequences fractional score X 1) + (employee groups with non-financial consequences X 1/2) X evidence score X 1.65 points
- Each checkbox selected is awarded the fraction score displayed next to it.
- The different fractions are summed up and then multiplied by the fractional score assigned to the type of consequence.
- The aggregated fractional score can never be higher than 1.
- This aggregate value is then multiplied by the evidence score.
Evidence: The evidence is manually validated and assigned a multiplier, according to the table below. The evidence must support the validation requirements.
If any requirements are not met, the evidence may be partially accepted or not accepted depending on the level of alignment with the requirements.
Validation status |
Score |
Accepted |
2/2 |
Partially accepted |
1/2 |
Not accepted/not provided |
0 |
If the respondent achieved the maximum fractional score for the second section, with partially accepted evidence (resulting in a multiplier of 0.5), the score would be:
(0 + 1/2) X 0.5 X 1.65 points = 0.41 points
If the respondent achieved maximum fractional score for the first section, with fully accepted evidence (resulting in a multiplier of 1), the score would be:
(1+0/2) X 1 X 1.65 points = 1.65 points