| WBS Number | WBS or Activity Description | Tech. Risk | Cost Risk | Sched. Risk | Tech. Wt. | Cost Wt. | Sched. Wt. | Contingency (%) |
| 4.2 | . | 0 | ||||||
| 4.2.1 | Refrigeration Systems | 0 | ||||||
| 4.2.1.1 | Helium Refrigerator | 4 | 3 | 8 | 4 | 2 | 1 | 30 |
| 4.2.1.2 | Liquid Nitrogen System | 0 | ||||||
| 4.2.1.2.1 | Liquid Nitrogen Dewar | 4 | 4 | 4 | 2 | 2 | 1 | 20 |
| 4.2.1.2.2 | Valves & Instrumentation | 4 | 4 | 4 | 2 | 2 | 1 | 20 |
| 4.2.1.2.3 | Pumps, Subcoolers & Other Equipment | 4 | 6 | 4 | 2 | 2 | 1 | 24 |
| 4.2.1.3 | Control System | 4 | 6 | 4 | 2 | 2 | 1 | 24 |
| 4.2.1.4 | Assembly & Test | 4 | 4 | 4 | 4 | 2 | 1 | 28 |
| 4.2.1.5 | Safety Report | 4 | 6 | 4 | 2 | 1 | 1 | 18 |
| 4.2.1.6 | Management & Integration | 4 | 6 | 4 | 2 | 1 | 1 | 18 |
| 4.2.2 | Transfer Systems | 0 | ||||||
| 4.2.2.1 | Cryogenic Transfer Line | 0 | ||||||
| 4.2.2.1.1 | End Cans | 4 | 4 | 4 | 2 | 2 | 1 | 20 |
| 4.2.2.1.2 | Expansion Boxes | 4 | 4 | 4 | 2 | 2 | 1 | 20 |
| 4.2.2.1.3 | Transfer Line Sections | 4 | 4 | 4 | 2 | 2 | 1 | 20 |
| 4.2.2.1.4 | Assembly & Test | 4 | 4 | 4 | 4 | 2 | 1 | 28 |
| 4.2.2.2 | Gas Piping System | 4 | 6 | 4 | 2 | 2 | 1 | 24 |
| 4.2.2.3 | Electrical Buss System | 4 | 6 | 4 | 2 | 2 | 1 | 24 |
| 4.2.2.4 | Water Systems | 4 | 6 | 4 | 2 | 2 | 1 | 24 |
| 4.2.2.5 | Control System | 4 | 6 | 4 | 2 | 2 | 1 | 24 |
| 4.2.2.6 | Safety Report | 4 | 4 | 4 | 2 | 1 | 1 | 16 |
| 4.2.2.7 | Management & Integration | 4 | 4 | 4 | 2 | 1 | 1 | 16 |
| 4.2.3 | Auxilliary Cryogenic Support Systems | 0 | ||||||
| 4.2.3.1 | Cryogenic Equipment for VLPCs | 4 | 6 | 4 | 4 | 2 | 1 | 32 |
| 4.2.3.2 | Equipment for Nitrogen Purging | 4 | 6 | 4 | 4 | 2 | 1 | 32 |