General mission statement:
Our goal is to enhance the mobility of a visually impaired person while gaining real-world experience.

Global constraints
Must be able to function autonomously.

Global criteria
Maximize run-time.
Minimize cost.
Off the shelf parts should be used whenever possible.

Mission Statement for revision #1
To build a robot capable of sensing and mapping an indoor environment.

Revision 1 constraints
Must detect/avoid moving objects.
Must map static objects.
Must be independently mobile.
User interaction is not necessary.
Must be able to navigate a 2D space.

Revision 1 criteria
Global criteria apply.