23 December 2008MSD I – Week 2

Completed week 1 deliverables Conducted benchmarking research on

possible subsystems and lighting terminology

Started formulating engineering specifications

Expanded contact list to former SOIL interns

Obtained spring radio for benchmarking

# Metric Units Importance (Stars) Potential Value

1 Production Cost U.S. $ ***** 50

2 Has On-Board Power Supply Binary ***** Yes

3 Usable Temperature Range °F or °C *** (30-120)°F or (0-50)°C

4 Water-Proof Binary *** Yes

5 Heat/Sand-Proof (Air Tight) Binary *** Yes

6 Storage Capacity mAh **** 6000

7 Recharge-ability Cycles ***** 500

8 Lifetime hrs ***** 100,000

9 Distribution of Light (Δ Lux)/(Δ m) ** ~0

10 Intensity of Light Lux **

11 Functional Drop Height m *** 3

12 Drop Cycles Cycles *** 50+

13 Lens Hardness (Resists Scratching) Mohs Hardness *** 6+

14 Efficiency Lumens/Watt *****

15 Efficiency hrs/charge ***** 60

16 Charge Time hrs *** ≤4

17 Recyclable Parts Binary * Yes

18 Environmentally Friendly Binary * Yes

19 Aesthetically Pleasing Subjective * Yes

20 Weight (Mass) lb (kg) ** <10lb (<4.5kg)

Get additional feedback on needs from new contacts

Refine final customer needs as customer information comes in

Solidify engineering specifications Benchmarking on spring radio