Table 1.
Option One: Cylinders only (status quo) | Option Two: Concentrators only | Option Three: Minimum number of concentrators with cylinder backup | Option Four: Convenient number of concentrators with cylinder backup | |
---|---|---|---|---|
Appraisal period | Five years | Five years | Five years | Five years |
Capital costs | $75,912 | $187,157 | $202,340 | $242,945 |
Operating costs | $717,091 | $72,568 | $231,692 | $231,692 |
Whole of life costs | $793,004 | $259,725 | $434,032 | $474,637 |
Whole of life savings | – | $558,151 | $358,972 | $318,366 |
Cost-benefit analysis of monetary costs and benefits | ||||
Present value of monetary benefits | – | $573,861 | $432,182 | $432,182 |
Present value of costs | – | $111,245 | $126,427 | $167,033 |
Net present value | – | $462,616 | $305,755 | $265,149 |
Multi-criteria analysis of non-monetary benefits: critical success factorsa | ||||
Oxygen availability | + | + | ++ | ++ |
Safety | + | ++ | + | + |
Ease of use | – | ++ | ++ | ++ |
Feasibility | + | – | ++ | ++ |
Affordability | – | ++ | ++ | ++ |
aKey
- Does not meet critical success factor
+ Meets the critical success factor partly
++ Meets the critical success factor completely