Table 2 Maintenance scenarios and corresponding program cost
Cost scenario: | A | B | C | |
|---|---|---|---|---|
No maintenance | Contracted-out maintenance: Intervention | In-house maintenance | ||
Assumed equipment lifetime reduction: | 39% | 0% | 0% | 0% |
(1) | (2) | (3) | (4) | |
Fixed Cost (in t = 0) | ||||
Management, contracted | ||||
IT-System | – | 181,196 | 181,196 | 181,196 |
Transport | – | 71,199 | 71,199 | 71,199 |
Office Space | – | 6875 | 6875 | 6875 |
Investment, in-house | ||||
Workshops | – | – | – | 421,830 |
Tools | – | – | – | 118,754 |
Preventive maintenance, contracted | ||||
Rapid inventory assessment | – | 251,355 | 251,355 | – |
Mobilization phase | – | 159,663 | 159,663 | – |
Total fixed cost | 0 | 670,288 | 670,288 | 799,855 |
Operating Cost (in t = 1,2,3) | ||||
Management, contracteda | ||||
IT-System | – | 71,094 | 71,094 | 71,094 |
Car | – | 17,977 | 17,977 | 17,977 |
Annual salaries | 178,720 | 178,720 | 178,720 | |
Replacement cost | 4,924,275 | 3,003,808 | 3,003,808 | 3,003,808 |
Maintenance cost | ||||
Invoiced program cost, contracted | ||||
Preventive maintenance | – | 465,777 | – | – |
Spare parts | – | 27,914 | 27,985 | – |
Calculated program cost, contracted | ||||
Preventive maintenance | – | – | 72,168 | – |
Corrective maintenance | – | – | 14,286 | – |
Calculated program cost, in-house | ||||
Annual salaries | – | – | – | 288,856 |
Spare parts and tests | – | – | – | 185,349 |
Total operating cost | 4,924,275 | 3,765,360 | 3,386,037 | 3,745,804 |
Downtime Cost | ||||
Total downtime costb | 104,547 | 65,925 | not applicable | |
Total program cost (NPV) | 5,028,823 | 4,501,574 | 4,056,325 | 4,545,658 |