OpexMX Articles
Insights and best practices on maintenance management, reliability, and manufacturing operations.
Bad Actor Analysis: Which Assets Are Eating Your Maintenance Budget
A small minority of assets produces the large majority of failures, downtime, and cost. These are the bad actors. Find them, fix them properly, and a maintenance team can cut its reactive workload by a third in a single quarter. Here is how to identify and target them.
Bearing Failure Analysis: Reading the Surface, Finding the Root Cause
Bearings are the most replaced component in rotating equipment and a leading cause of unplanned downtime. The failure modes are catalogued, the root causes are known, the detection technologies are mature. A field guide to what kills bearings and how each mode looks in the data.
Hidden Failure Modes: The Failures You Cannot See Until They Are Needed
Not every failure announces itself. A stuck-closed relief valve looks exactly like a working one until the vessel overpressures. Hidden failures affect protective and standby systems and need a fundamentally different strategy: a deliberate test, not condition monitoring. Why, and how to size the interval.
Defect Elimination: Getting Off the Fail-and-Fix Treadmill
Most maintenance teams are excellent at fixing things, and that is the wrong target. Defect elimination breaks the fail-and-fix loop by removing causes instead of speeding up repair. The process, the symptom-vs-cause skill, and why the no-time objection is backwards.
Fault Tree Analysis (FTA): Mapping How a Failure Actually Happens
FTA is the structured method behind serious root cause analysis: start with the failure, work down through AND and OR gates to every combination of causes that can produce it. How to build one, what minimal cut sets are, and when to use FTA versus FMEA.
Thermography (Infrared Inspection): Seeing the Heat Before the Failure
A thermal camera sees the heat every fault produces, long before noise or vibration shows up. Electrical connections run hot for weeks before they arc. Here is what IR thermography detects, how to do it right, and where it fits alongside vibration and oil analysis.
Oil Analysis for Predictive Maintenance: Reading the Machine’s Blood Test
Oil is the blood test of a machine — wear metals, contamination, and degradation each point to a different fault. Which tests matter, how to sample without poisoning the data, and the one rule that separates a useful program from an expensive one.
Run-to-Failure Maintenance: When Doing Nothing Is the Right Strategy
Run-to-failure is not neglect — it is a deliberate maintenance strategy for the right assets. What RTF actually requires, when it pays off, when it is reckless, and how to decide which assets earn it.
Remaining Useful Life (RUL): The One Maintenance Metric That Looks Forward
Most reliability metrics look backward. Remaining useful life looks forward. Here is what RUL actually is, the three ways to estimate it, and why it only matters when it triggers a work order.