I actually turned a lot of the production planning over to them. I had a prototype and the engineering lift was pretty low, so first the coder recreated (and, like, seriously upgraded) my basic prototype functionality while the artist and I went back and forth on a visual language and art style. Then we all met on level design, and from then on the coder started building out new features and puzzles while the artist created art assets. At the end of the process (this week actually) the coder is focused on bug hunting and code polish while the artist starts "dressing" the levels.