Rationale Report

*Please note that I will be using a motor for both moving parts due to availability rather than a motor and a servo. Also, my partner ES has changed the dimensions of the vessel so some of my measurements may be incorrect, I will make changes accordingly.
(see alternate solutions: http://se2glassbottomboatmm.blogspot.com/search/label/Brainstorming%20and%20Alt.%20Solutions)

Alt. Solution # 1

Useful:  This solution is useful because it allows scientists to film benthic and nekton creatures.

Usable: This solution would only be operated on one system.  There would only be one control and would only require the radio control and a place to connect the camera's transmitter.  The control would be a simple joystick.  Also, there will be no wires to get tangled.

Desirable: Because this solution is so easy to operate it would be desirable for more operators.

Producible: A mechanic moving ball and socket joint is nearly impossible to find for the purposes of this project.  Aside from the difficulty of finding that piece the rest of the design is uncomplicated and easy to produce.

Profitable: This solution is profitable because scientists can use it to film sea creatures when they cannot go into the water themselves, also it can be used for recreational purposes if the buyer chooses to.  Though, some of the parts may be more expensive, which will raise the cost of the vessel in the end.

Differentiated: This solution is very different from the following solution because it involves a different shaped bottom as well as a completely different type of system to move the camera.  The dome provides a different way for the camera to view the underwater world.

Fig. 1: Side view of solution #1

Alt. Solution #2

Useful: This solution is useful because it allows scientists to film benthic and nekton creatures.

Usable: This solution will be operated on two different systems so it will require two different controls.  It will still be simple and easy to operate.  There will be no wires to get tangled.

Desirable: Because this solution is only operated on two systems it will still be easy to operate and be desireable.

Producible: All of the parts of this design are easy to find and can be put together with little difficulty.  The design is easy to produce and the parts are easy to find, which makes this solution stronger than solution one.

Profitable: This solution is profitable because scientists can use it to film sea creatures when they cannot go into the water themselves, also it can be used for recreational purposes if the buyer chooses to.  The parts for this design are relatively cheap so the overall product would be inexpensive to make, which would lead to more profit for the producers.

Differentiated: This solution is cheaper to make, has parts that are easier to find, is less fragile, and still provides a clear view for the camera.

Fig. 2: Side view of solution #2

I have chosen solution two because it is cheaper and easier to make than solution one.  Solution two is also a stronger and safer design than solution one.

Drawings done by MM by hand and using AutoCAD.