R-value (insulation) as ASHRAE 90.1 and the IECC prescribe U-values. However, R-value is widely used in practice to describe the thermal resistance of insulation products, layers, and most other parts of the building enclosure (walls, floors, roofs). Other areas of the world more commonly use U-value/U-factor for elements of the entire building enclosure including windows, doors, walls, roof, and ground slabs. The SI (metric) unit of R-value is whereas the I-P (inch-pound) unit is For R-values there is no difference between US customary units and imperial units, so the same I-P unit is used in both. Some sources use ″RSI″ when referring
Synthetic measure Synthetic measure A synthetic measure (or synthetic indicator) is a value that is the result of combining other metrics, which are measurements of various features. There is a method to measure quality of service in hotels. In related study authors aggregate tourist opinions, measured on a scale from 1 to 10. Synthetic measure (indicator) of service quality in each hotel is calculated with the help of the aggregation operator. Other study proposed to use classical parameters EV, PV and AC to carry out the synthetic measure of project performance. Different normalized stimulants and destimulants were used in research to create