Pre-cut is the most basic kind of prefabrication.
Instead of cutting timber on the site, carpenters buy beams that are already cut to measure. All they have to do is to assemble those parts in frames.
This method saves some time and some material and it is fairly cheap concerning transport costs.
However, the quality of the build still depends on the skill of the on-site carpenters and the overall construction time of the house is not reduced much compared to a traditional on-site stick-built.
The quality is the same of a traditional on-site stick-built.
This solution can be used when the site is difficult to access or when the builder has to keep its team of carpenter busy with some work.