How much Freedom?
On Freedom management.
The employee should be given as much control over his work as he can bear. This meets the requirement for the planning in that there should be just enough planning to induce day-to-day tasks, no more.
More freedom brings more responsibility and emotional involvement, by creating a sense of ownership between the employee and the product.
The freedom may morph into frustration if the employee takes on the challenges he can not endure.