Final answer:
In engineering, specifically related to tool positioning in machining, an underdirected tool position traditionally needed a base size at least five times the tool diameter side-to-side and seven to eight times deep.
Step-by-step explanation:
The subject of this question deals with the principles of engineering, specifically related to machining or tooling operations where the tool positioning relative to the workpiece is a critical factor. When referencing an underdirected tool position, the traditional rule of thumb recommended that the base size be at least five times the diameter of the tool side-to-side, and seven to eight times deep. However, according to newer studies and practices in the field, it is now suggested that the base size be as much as eight diameters side-to-side and up to fifteen diameters deep.
In underdirected tool position, the base size should be at least 15 times the diameter of the tool. This means that the base should have a diameter that is 15 times larger than the diameter of the tool being used. For example, if the diameter of the tool is 1 inch, the base size should be at least 15 inches in diameter.