PMV is a very technical term and can be difficult to communicate. Instead, a fictive temperature, the experienced temperature, can be calculated from the PMV value. This can be done to explain effects of changes in PMV, for instance, higher or lower air velocity, humidity or radiant temperature. Experienced temperature can also include the effect of direct solar radiation and is often relevant when the effect of windows in combination with shading is evaluated.
Most of the background for the PMV index is based on studies in climate chambers, which can be very different from a normal office or home environment.As an alternative approach, thousands of building occupants have been involved in field studies in real buildings, where measurements and questionnaires have been used to correlate the temperature to the thermal sensation experienced by the occupants. The results show that, in buildings with natural ventilation, the outdoor temperature during the previous week has an influence on the temperature we accept indoors on a given day; the higher the outdoor temperature, the higher an indoor temperature we accept. Adaptation requires access to openable windows, and that the occupant has freedom to adjust clothing. Part of the explanation of adaptation is that a psychological process is involved. See section 3.6.4
for an explanation of how the adaptive approach is used for classification of thermal comfort.