Concept Screening Matrix
| Success Criteria | Reference | Design A | Design B | Design C | Design D | Design E |
| Stability | 0 | + | + | + | + | + |
| Minimal Blockage | 0 | 0 | 0 | + | 0 | – |
| Maintenance | 0 | 0 | 0 | + | + | – |
| Durability | 0 | – | 0 | 0 | 0 | 0 |
| Safety | 0 | – | 0 | 0 | 0 | 0 |
| Sum +’s | 0 | 1 | 1 | 3 | 2 | 1 |
| Sum 0’s | 5 | 2 | 4 | 2 | 3 | 2 |
| Sum -‘s | 0 | 2 | 0 | 0 | 0 | 2 |
| Net Score | 0 | -1 | 1 | 3 | 2 | -1 |
| Continue | Revise | No | Revise | Yes | Yes | No |
Stability – The quality that determines the tendency to remain balanced underneath the track.
Minimal Blockage – How large the cross-sectional area of the front is.
Maintenance – How quickly it can be built, edited, and repaired.
Durability – The measure of how it resists damage.
Safety – A measure of how likely it is to hurt someone around the area that it is running; it also includes the placement of wires around the parts.
Concept Scoring Matrix
| Reference | C | D | |||||
| Success Criteria | Weight | Rating | Weighted Score | Rating | Weighted Score | Rating | Weighted score |
| Stability | 25% | 3 | .75 | 5 | 1.25 | 4 | 1.0 |
| Minimal Blockage | 15% | 3 | .45 | 4 | .6 | 3 | .45 |
| Maintenance | 15% | 2 | .3 | 4 | .6 | 4 | .6 |
| Durability | 20% | 3 | .6 | 3 | .6 | 3 | .6 |
| Safety | 25% | 3 | .75 | 3 | .75 | 3 | .75 |
| Total Score | 2.85 | 3.80 | 3.40 | ||||
| Continue? | No | Yes | Revise | ||||