Maintenance Planner
Exact enumeration of 512 subsets of 9 eligible actions. Verified findings in use: none.
Constraints
Optimised portfolio (exact)
- A-01 Inspect suction / strainer (P-102)
- A-06 Service valve actuator (V-201)
- A-08 Stroke-test valve (V-202)
- A-10 Thermographic inspection (MCC-401)
- A-11 Test standby pump (P-104)
Physical mitigation
53.040
Information value
122.000
Composite
107.940
Risk-first greedy (same constraints)
- A-06 Service valve actuator (V-201)
- A-01 Inspect suction / strainer (P-102)
- A-04 Inspect vibration / bearings (P-103)
- A-09 Clean cooling path and retest (VFD-301)
Physical mitigation
70.064
Information value
63.000
Composite
98.414
Physical mitigation proxy: optimised 53.040 vs greedy 70.064. Composite decision value: 107.940 vs 98.414. The optimiser scores higher here only because it buys more information (inspections). This is not proven failure-risk reduction — adjust λ to see the trade-off.
All candidate actions
A-01 Inspect suction / strainer (P-102)
optimalgreedy₹12,000 · 3 h · 0 m · inspection
mitig 0.000 · info 38 · value 17.100
A-02 Impeller overhaul (P-102)
blocked₹96,000 · 12 h · 120 m · repair
Engineering evidence gate: requires verified finding impeller_damage
A-03 Clean obstructed strainer (P-102)
blocked₹16,500 · 4 h · 15 m · repair
Engineering evidence gate: requires verified finding strainer_blocked
A-04 Inspect vibration / bearings (P-103)
eligiblegreedy₹14,500 · 3 h · 0 m · inspection
mitig 0.000 · info 25 · value 11.250
A-05 Replace bearings (P-103)
blocked₹64,000 · 9 h · 75 m · repair
Engineering evidence gate: requires verified finding bearing_damage
A-06 Service valve actuator (V-201)
optimalgreedy₹58,000 · 8 h · 90 m · repair
mitig 53.040 · info 0 · value 53.040
A-07 Recheck valve operability (V-201)
eligible₹9,000 · 2 h · 0 m · inspection
mitig 0.000 · info 11 · value 4.950
A-08 Stroke-test valve (V-202)
optimal₹8,000 · 2 h · 0 m · inspection
mitig 0.000 · info 28 · value 12.600
A-09 Clean cooling path and retest (VFD-301)
eligiblegreedy₹18,000 · 3 h · 0 m · service
mitig 17.024 · info 0 · value 17.024
A-10 Thermographic inspection (MCC-401)
optimal₹9,500 · 2 h · 0 m · inspection
mitig 0.000 · info 16 · value 7.200
A-11 Test standby pump (P-104)
optimal₹11,000 · 3 h · 0 m · inspection
mitig 0.000 · info 40 · value 18.000
A-12 Correct failed standby start (P-104)
blocked₹52,000 · 7 h · 60 m · repair
Engineering evidence gate: requires verified finding failed_standby_test
A-13 Routine check (P-101)
eligible₹6,500 · 2 h · 0 m · inspection
mitig 0.000 · info 4 · value 1.800
| ID | Asset | Action | Type | Cost | Crew h | Outage m | Mitig. pts | Info pts | Decision value | Status |
|---|---|---|---|---|---|---|---|---|---|---|
| A-01 | P-102 | Inspect suction / strainer | inspection | ₹12,000 | 3 | 0 | 0.000 | 38 | 17.100 | eligibleoptimalgreedy |
| A-02 | P-102 | Impeller overhaul | repair | ₹96,000 | 12 | 120 | — | — | — | blocked Engineering evidence gate: requires verified finding impeller_damage |
| A-03 | P-102 | Clean obstructed strainer | repair | ₹16,500 | 4 | 15 | — | — | — | blocked Engineering evidence gate: requires verified finding strainer_blocked |
| A-04 | P-103 | Inspect vibration / bearings | inspection | ₹14,500 | 3 | 0 | 0.000 | 25 | 11.250 | eligiblegreedy |
| A-05 | P-103 | Replace bearings | repair | ₹64,000 | 9 | 75 | — | — | — | blocked Engineering evidence gate: requires verified finding bearing_damage |
| A-06 | V-201 | Service valve actuator | repair | ₹58,000 | 8 | 90 | 53.040 | 0 | 53.040 | eligibleoptimalgreedy |
| A-07 | V-201 | Recheck valve operability | inspection | ₹9,000 | 2 | 0 | 0.000 | 11 | 4.950 | eligible |
| A-08 | V-202 | Stroke-test valve | inspection | ₹8,000 | 2 | 0 | 0.000 | 28 | 12.600 | eligibleoptimal |
| A-09 | VFD-301 | Clean cooling path and retest | service | ₹18,000 | 3 | 0 | 17.024 | 0 | 17.024 | eligiblegreedy |
| A-10 | MCC-401 | Thermographic inspection | inspection | ₹9,500 | 2 | 0 | 0.000 | 16 | 7.200 | eligibleoptimal |
| A-11 | P-104 | Test standby pump | inspection | ₹11,000 | 3 | 0 | 0.000 | 40 | 18.000 | eligibleoptimal |
| A-12 | P-104 | Correct failed standby start | repair | ₹52,000 | 7 | 60 | — | — | — | blocked Engineering evidence gate: requires verified finding failed_standby_test |
| A-13 | P-101 | Routine check | inspection | ₹6,500 | 2 | 0 | 0.000 | 4 | 1.800 | eligible |
Mitigation = condition index × criticality / 5 × mitigation fraction (zero for inspections). Decision value = mitigation + λ × information value. One action per asset.