Classify plant machinery into A, B, and C priority tiers with tailored maintenance strategies.
How does 5x5 Asset Criticality Ranking govern maintenance strategy?
Standardized under NORSOK Z-008 and SMRP, asset criticality evaluates equipment on a 5x5 risk grid combining Failure Likelihood with Consequence (Safety, Environmental, Production, and Cost). This classifies equipment into Tier A (Critical), Tier B (Essential), and Tier C (Non-Critical) to allocate condition monitoring and spares budgets.
| Asset | Safety | Env | Prod | Cost | Likelihood | Score | Tier | Strategy |
|---|---|---|---|---|---|---|---|---|
| Raw Material Feed Conveyor | 2 | 1 | 5 | 3 | 3 | 9.75 | Tier A | Critical: Condition monitoring, dedicated spares, formal RCM |
| Chlorine Gas Injection Dosing Pump | 5 | 5 | 3 | 2 | 2 | 7.20 | Tier A | Critical: Condition monitoring, dedicated spares, formal RCM |
| Effluent Clarifier Mixer | 1 | 4 | 2 | 2 | 2 | 4.10 | Tier C | Run to failure or basic operator inspection |
| Workshop Air Compressor | 1 | 1 | 2 | 1 | 2 | 2.80 | Tier C | Run to failure or basic operator inspection |
Plant assets cannot all receive equal maintenance resources. Asset criticality ranking ensures high-risk equipment receives proactive predictive monitoring, while low-consequence assets are managed economically with run-to-failure policies.
Rank system failure modes by risk priority and assign mitigation actions with XLSX/PDF exports.
Availability & PerformanceIdentify the 20% of failure modes generating 80% of lost production time.
Maintenance Planning & StrategySelect the most cost-effective maintenance strategy based on failure pattern and detectability.