In general, the edge sorting has been used for light and short lumber, up to 16 or 20 feet, with comparatively few sorts, say up to 12. Automatic stackers are also in a comparatively primitive state of development and are not generally found in any but the largest mills. The principles applied in building an automation sawmill differ markedly from those used in building an older type of sawmill, geared to the limitation of human muscle and ability. An automation sawmill is not merely one with automation equipment but is engineered for the most efficient layout and flow of logs and lumber. Many designs of automation mills are available and can be adapted to particular mill conditions.
Automation requires labor with a certain degree of skill and training.
When installing automation equipment, provision should also be made at the same time to procure or train labor to handle this equipment. Automation equipment requires good preventive maintenance. Provision should be made for maintenance of automation equipment at the time of its installation. New ideas and equipment require a transition period. Defects need to be adjusted or mended.