How to avoid workpiece deformation by NC cutting?

Sometimes the cutting parts will be deformed, so we need to take some measures to control and prevent. So, what measures should we take?
(1) The purity of oxygen used should be sufficient as it relates to the smoothness and flatness of the incision surface. If the oxygen purity is not enough, the incision will become rough, which will affect the cutting quality.
(2) After cutting several workpieces, do not rush to clean them up, which can effectively control the deformation.
(3) If it is a thin part, it can be cooled locally or compensated by pre adding shrinkage value in programming according to the length, width and thickness of the cutting part.

(4) There is almost no Perpendicularity Error between the cutting nozzle and the steel plate surface, that is to say, the cutting nozzle and the steel plate surface should be vertical, otherwise the size error of the cutting piece will appear.
(5) The workpiece prone to deformation shall be placed in the middle of the whole steel plate as far as possible, and the distance between the workpieces shall be sufficient.
(6) Select a reasonable cutting sequence and the position of the piercing point should be correct to avoid deformation of the cutting piece.