The following four adjustments can be made to all kinds of guitars to fix them. These adjustments will fix all guitars and make them playable. The adjustments are the amount of relief in the neck using an adjustable truss rod, the string height at the saddle, the string height at the nut and the intonation.
These adjustments should be made at least once on every guitar. Most manufacturers do not take time to properly do these adjustments. A manufacturer only does these adjustments for the average player, but not for the individual player.
How do you adjust the amount of the neck bow? It is supposed to be simple. Every adjustable truss rod shares the same principles of operation. Every truss rod has a threaded nut tightened on a threaded metal rod. The tension in the rod changes the curvature of the neck in which the the rod is embedded. To adjust the rod, you need to tighten or loosen the nut on the rod. When tighten the nut, the tension increases the tension in the rod as well the amount which the rod counteracts the pull of the strings. This should reduce the bow in the neck.
As far as adjusting the saddle height, you can do this either before or after...