The original error reduction method:
When the error is found in production, we should first find out the main factors that generate the processing error, and then try to eliminate or reduce these factors. For example, when processing shaped workpieces, we should reduce the shaped blade's error and avoid any blade installation errors.

The original error compensation method:
Artificially creating a new error to offset the original error generated in the processing. When the original error is negative, the manual error is positive, otherwise is negative, and the size of the two is equal.

The original error transfer method:
For the original error generated in processing, under certain conditions, it can be transferred to the non-sensitive direction or other aspects that do not affect the machining accuracy. For example, when the precision of the machine tool cannot meet the requirements of the parts processing, it is possible to create conditions from the process or fixture, meaning the geometric error will not affect the processing accuracy.

The original error equating method:
If the positioning error is large, some original errors can be differentiated. The original error is divided into N group according to its size. The error range of each blank is reduced to the original 1/n, and then the processing is adjusted according to each group.

Original error averaging method:
A homogenizing method can be used for workpieces with high machining accuracy. It is used to find out the difference from the contrast by comparing surfaces which are closely related to each other, and workpieces need to be adjusted and processed on the basis of a benchmark between each other, thus reducing the error of processed surfaces of workpieces continuously until it have been equalized.