# Quantities

<div id="bkmrk-establishing-the-qua">Establishing the quantities of the goods VTTI handles is the responsibility of OPS. Quantities are typically established by means of ENRAF, VTTI’s automated gauging system which is certified. In case of specific reasons, the ENRAF readings turn out to be unreliable, the ENRAF reading can be overwritten with clear explanations as to why the reading was overwritten.</div><div id="bkmrk-a-link-to-vtti%27s-%22c%26">  
<p class="callout info">A link to VTTI's "C&amp;E - OPS Measurements" procedure is included [here](https://www.bzctrl.com/bzctrl-core-api/api/v1/docrepo/getDocument/343ba983-99ff-449e-9cfa-8e4a786f0621 "https://www.bzctrl.com/bzctrl-core-api/api/v1/docrepo/getDocument/343ba983-99ff-449e-9cfa-8e4a786f0621").</p>

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