Phractle uses graphic editing software to design you a custom web interface. This stands alone file can be used by an Interface Technician, like him, to export all image objects and codes them into an interactive prototype.
This can give you a top down perspective of how the website will look and feel, as well as how the different pages will be laid out and function. If Phractle is provided a sitemap before he begins designing, that would make the process efficient and effective.
This will not be interactive and will be delivered as several images and one source file with mark up notes and a guide file on how to begin developing the prototype of the interface.