[2] Uster Technologies mainly produces laboratory and on-line systems used to measure and control the quality of fibers, yarns and fabric.

Modern, industrial cotton gins often operate with sensors by Uster, to control their process and to the resulting fiber quality.

Hence Uster's HVI has defined a set of standards for a large part of all cotton trades worldwide.

Most important process parameters a spinning mill has to control are: quality of the incoming fibers, yarn evenness, hairiness, tensile strength and elongation, contamination with disturbing materials, twist, friction, etc.

The first so-called "Uster Statistics" were introduced in 1957 and have been periodically updated to account for the technical and regional changes in the industry.