The aim of field inspections is to register the odours immediately recognized under real field conditions.
The main idea of field inspections is to estimate the degree of annoyance in a determined problematic area by means of the olfactory capacities of a group of people (or panel) specially trained and "calibrated" for this purpose. To this effect, the study area is divided in smaller assessment squares and the people of the panel is sent to the nodes of this squares at different times of the day and in a determined order to allow the most diverse conditions. Anytime a person of the panel reach a node, smells the air and take notes of odour parameters (Intensity, hedonic tone, etc.), weather conditions and some other data on site.