Client provide requirement of the project, we can discuss if buyer need more creative idea about the project. I can also do marketing research for buyer who don't have idea about the market trend. Once the art style is confirmed, I will color the illustration to final in the deadline, buyer can review the work during the creative process and give suggestions. I can provide pencil draft and the final color illustrations in required resolution and size. If psd file is needed, let me know before I color, so that I can work the file layers better.