Question / Category | Different problem classes | Problem incidents | ||
---|---|---|---|---|
 | N | % | N | % |
6. Solution approach: What primary action does it take to solve the problem? | ||||
 Settings (i.e. heating control) | 14 | 32% | 390 | 47% |
 Service (including spare parts) | 29 | 66% | 423 | 51% |
 Considerable effort needed | 1 | 2% | 9 | 1% |
7. Problem solver: Who can solve the problem? | ||||
 Guided user | 11 | 25% | 345 | 42% |
 Energy consultant | 6 | 14% | 69 | 8% |
 Hardware installer | 18 | 41% | 350 | 43% |
 Technician | 9 | 20% | 58 | 7% |
8. Implementation costs: What does it cost to solve the problem? | ||||
 CHF < 50 | 19 | 43% | 467 | 57% |
 CHF 50–99 | 6 | 14% | 89 | 11% |
 CHF 100–249 | 8 | 18% | 42 | 5% |
 CHF 250–499 | 3 | 7% | 15 | 2% |
 CHF ≥ 500 | 8 | 18% | 209 | 25% |