I read Geology and Geography at the University of Brighton before I ever drew a garden, and it has quietly shaped everything since. Soil, levels, drainage and aspect are not the dull bit before the nice bit — they are the reason one scheme thrives and an almost identical one two streets away sulks for five years.
So the second stage of every commission is a full topographical survey: landforms, existing planting and trees, buildings, structures and services, measured up into a scaled base plan. Soil samples and aspect go in alongside it. Only then do the concept drawings start.
The practice is just me. The person who walks your garden on the first visit is the person surveying it, drawing the concept, colouring the master plan and standing in the garden with the contractor while it is built. Nothing gets handed on and nothing gets lost.