Draft (Unsigned)
Asset Configuration
COMPONENT IDENTITY & CRITICALITY CLASS
Safety / Criticality Rating
Reliability Model Basis
FAILURE DISTRIBUTION PARAMETERS
Exponential distribution: R(t) = exp(−t / MTBF)
Operational Parameters
MAINTENANCE TIMING & COST INPUTS
⚠ Asset / component name is required.
Analysis Results at T = 1,500 hrs
RELIABILITY ENGINEERING OUTPUTS
⬤ SYSTEM ASSESSMENT: Interval Too Long
RELIABILITY R(T) 60.65% PROB. SURVIVE TO INTERVAL
FAILURE PROB. F(T) 39.35% PROB. FAIL BEFORE INTERVAL
AVAILABILITY A 99.47% OPERATIONAL FRACTION
EXPECTED CM EVENTS 0.500 CORRECTIVE MAINT./CYCLE
COST RATE ($/HR) $10 TOTAL COST PER OP. HOUR
SAFETY CLASS MEDIUM CRITICALITY LEVEL
Model Details
• CM Burden: Expected corrective repairs per PM cycle = 0.5000 events → 4.0 hrs corrective downtime
• PM Burden: 1 scheduled event per cycle → 4 hrs planned downtime
• CM Cost per Cycle: 0.5000 × $25,000 = $12500
• Total Cost per Cycle: $15500 → $10.33/hr
Scenario Comparison – Interval Sensitivity
5 CANDIDATE INTERVALS vs. KEY METRICS
| Interval (hrs) | R(T) | F(T) | Availability | Cost $/hr | Assessment |
|---|---|---|---|---|---|
| 750 ★ best | 77.9% | 22.1% | 99.2% | $12.3 | Review Needed |
| 1,125 | 68.7% | 31.3% | 99.4% | $11.0 | Interval Too Long |
| 1,500 ← candidate | 60.7% | 39.3% | 99.5% | $10.3 | Interval Too Long |
| 1,875 | 53.5% | 46.5% | 99.5% | $9.9 | Interval Too Long |
| 2,250 | 47.2% | 52.8% | 99.6% | $9.7 | Interval Too Long |
★ Best = lowest cost rate among acceptable scenarios (R ≥ 85%, A ≥ 90%) ← candidate = your entered interval