A couple articles that I wrote have been published and I invite you to check them out:
The article begins on page 42. It is the first of three parts that discuss the essence of sketch routing in the Xpedition Layout product. The three parts are: control, quality, and performance.
The evolution of auto-routing technology has a long history, mostly with marginal success. Today’s approach is more about empowering the designer with high levels of routing automation.