Proper planning is the essential first step in the garden design process. After the master plan is drawn and accepted, though, the work of implementing design projects begins. As a design evolves, many issues will be considered including the use of appropriate materials, sizing of walks and roads, the desire for flexibility to express new ideas, the need for standardization or replacement parts and the sense of continuity between old and new parts of the garden. Written by David A. Mittlestadt, 1990