The Engineering Assistant Hologram was created by Doctor Lewis Zimmerman and Captain Montgomery Scott and was similar to the Emergency Medical Hologram. The image file was made in the image of Scott's great-granddaughter, Gabrielle Scott. The EAH is designed to assist in analyzing computer settings, running ship-wide diagnostics, and taking over should the chief engineer be injured. The program is far more advanced than the original EMH, as it uses a new positronic matrix for its data core, being based on Noonien Soong's original design.