> For the complete documentation index, see [llms.txt](https://www.bilancarbone-methode.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://www.bilancarbone-methode.com/methode-bilan-carbone-r-en/4-accounting/4.4-method-for-estimating-uncertainties.md).

# 4.4 - Method for estimating uncertainties

<figure><img src="/files/70647433277599f28182b00b34484d6663b3c836" alt="" width="563"><figcaption><p>Source: Freepik</p></figcaption></figure>

This subsection details what an uncertainty is, [why](/methode-bilan-carbone-r-en/4-accounting/4.4-method-for-estimating-uncertainties/4.4.1-why-uncertainties.md) these are an integral part of the Bilan Carbone® method, and [how](/methode-bilan-carbone-r-en/4-accounting/4.4-method-for-estimating-uncertainties/4.4.2-how-should-they-be-determined.md) to estimate them, whether qualitatively or quantitatively:&#x20;

* [4.4.1 - Why uncertainties?](/methode-bilan-carbone-r-en/4-accounting/4.4-method-for-estimating-uncertainties/4.4.1-why-uncertainties.md)
* [4.4.2 - How to determine them? ](/methode-bilan-carbone-r-en/4-accounting/4.4-method-for-estimating-uncertainties/4.4.2-how-should-they-be-determined.md)

{% hint style="info" %}
As a reminder, emissions from each emission source of the organisation are estimated as follows:

Emission from a source = [Activity data](/methode-bilan-carbone-r-en/4-accounting/4.2-method-for-collecting-activity-data.md) x [emission factor](/methode-bilan-carbone-r-en/4-accounting/4.3-method-for-selecting-emission-factors.md) = [result](/methode-bilan-carbone-r-en/4-accounting/4.5-emission-profile.md) ± [higher](/methode-bilan-carbone-r-en/4-accounting/4.4-method-for-estimating-uncertainties.md)
{% endhint %}

***

*Do you have a comprehension question?* [*Consult the FAQ*](/methode-bilan-carbone-r-en/annexes/faq.md)*. The method is living and therefore likely to evolve (clarifications, additions): find the* [*track of changes here*](/methode-bilan-carbone-r-en/foreword/history-and-tracking-of-changes.md)*.*


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