The touch of your piano, how each key feels when it is played, determines the amount of control you have over the instrument. Regularly played pianos, whether in the home, studio, or on the concert stage, can become uneven and less responsive.
The piano action contains about 8,000 parts that are primarily made of wood and felt. As felt compresses over a period of time, the evenness of touch will change, meaning most of the components need adjustments to tolerances of a few thousandths of an inch.
For normal home playing, we recommend making adjustments to action regulation every two to three years.