17. Decision Matrix Method Speed Reusability Complexity Portability Availability score Solar(magnifying glass) 3 5 3 4 2 17 Electricity 5 3 1 3 2 14 Friction 1 5 2 5 5 19 Concave Mirrors 3 5 4 3.5 4 19.5 Scale 1 Worst: Shows no potential. Does not appear to satisfy needs of client. 2 Shows some notion that it will work somewhat effectively 3 Moderate: Shows half ideas of each category will comply with needs of client 4 Shows most idea components are easy to get/use and are eco friendly 5 Best: Shows the most potential of being eco friendly, affordable and easy to use