> For the complete documentation index, see [llms.txt](https://kb.bravegen.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://kb.bravegen.com/carbon/core-concepts/activity-sources/data-quality.md).

# Data Quality

Assess and report the quality of activity-source data.

BraveGen Carbon records data quality scores for Activity Sources. Use these scores in supported reports and data quality disclosures.

### Set data quality scores

Set a score for each activity source in its **Data Quality** tab. You can update scores at any time.

Scores are not time-bound. They represent the source's current known data quality. [Snapshots](/carbon/audit-trail/snapshots.md) retain historical scores.

Use scores to support internal reviews, prioritisation, and disclosure commentary. They do not quantify measurement uncertainty unless you assess it separately.

The following Data Quality Indicators can be set on each Activity Source:

#### GHG Data Quality

<details>

<summary>Precision</summary>

How was the data obtained or measured?

</details>

<details>

<summary>Completeness</summary>

How complete is the data you are collecting?

</details>

<details>

<summary>Temporal</summary>

How accurate are the data time periods?

</details>

<details>

<summary>Geographical</summary>

How accurate is this data to this location?

</details>

<details>

<summary>Technological</summary>

Are you measuring actual equipment, how accurate is it?

</details>

#### NGERS Data Quality

<details>

<summary>Measurement Criterion</summary>

AAA - Quantity measured at point of sale or consumption

AA - Quantity measured by stockpile change estimation & invoices

A - Quantity verified by invoices

BBB - Quantity measured / estimated inline with industry practices

</details>

#### PCAF Data Quality

<details>

<summary>PCAF Data Quality Score</summary>

1 - Audited / Verified

2 - Unverified Reported

3 - Physical Activity-based

4 - Economic Activity-based

5 - Sector Average

</details>

### Configure data quality definitions

BraveGen Carbon provides standard definitions for each supported framework. Review, accept, or customise these definitions under **Settings → Carbon Configuration → Data Quality**.

{% content-ref url="/pages/wTJivtB4S9KGSzfYkoMw" %}
[Data Quality Definitions](/carbon/configuration/data-quality-definitions.md)
{% endcontent-ref %}

Snapshots retain the applicable data quality definitions.

{% hint style="info" %}
You can enable a data quality framework without its reporting framework. For example, use PCAF data quality scores for inventory items outside PCAF reporting.
{% endhint %}

#### GHG Protocol uncertainty

Each data quality definition includes a score. Use this score when calculating uncertainty. See the [GHG Protocol uncertainty guidance](https://ghgprotocol.org/sites/default/files/2023-03/ghg-uncertainty.pdf).

### FAQ

<details>

<summary>Can I ingest data quality scores through data collection?</summary>

No. Set data quality scores individually in the source detail.

</details>