What is Reliability Engineering? The Complete Guide for Asset-Intensive Industries

Reliability engineering defined

At its core, reliability engineering answers three questions about every asset:

1. How will it fail? Identifying every credible failure mode through structured analysis (FMECA)
2. What are the consequences? Quantifying the safety, environmental, production, and cost impact
3. What is the right maintenance response? Selecting the optimal task for each failure mode

HolisticAM works through these three questions asset by asset for mining, rail and utilities operators across Australia, and every maintenance task it recommends traces back to one of them.

Why reliability engineering matters

The commercial case, in the language a board uses, is set out in The Reliability P&L Manifesto.

Organisations without structured reliability engineering run far more reactive maintenance than they think. The US Department of Energy’s O&M Best Practices Guide reports that more than 55% of maintenance activity at the average facility is still reactive, and the cost of that pattern is well documented:

• Reactive maintenance costs two to three times more per asset than proactive programs. The DOE guide cites study costs of about US$18 per horsepower per year for run-to-failure maintenance, against US$9 for a predictive program and US$6 for reliability centred maintenance
• Unplanned downtime in heavy industry costs the average plant US$128 million a year, and an hour of unplanned downtime in oil and gas runs to almost US$500,000, according to Siemens’ True Cost of Downtime 2022 research
• Shifting reactive work to planned work cuts total spend. The DOE estimates a preventive program saves 12-18% over reactive maintenance on average, and that facilities heavily reliant on reactive maintenance can realise savings opportunities exceeding 30-40% from a functional predictive program
• Downtime reductions of 35-45% are the industrial average the DOE guide reports from surveys of functional predictive maintenance programs

HolisticAM’s Reliability Assessments on Australian mine sites start by measuring this reactive ratio, because it sets the size of the prize before any strategy work begins.

Core reliability engineering disciplines

FMECA is the foundation: a facilitated workshop identifying every failure mode, assessing consequences, and selecting the optimal maintenance task.

Reliability centred maintenance (RCM) is a decision framework for selecting the right task type based on failure mode characteristics.

Weibull analysis uses statistical modelling to determine failure distributions and set optimal intervals.

Condition monitoring replaces fixed-time replacements with inspections detecting degradation before failure.

RAM analysis uses simulation to predict system-level performance and identify bottlenecks.

Root cause analysis investigates significant failures to identify true causes and prevent recurrence.

HolisticAM delivers each of these disciplines for Australian heavy industry, with a full FMECA as the starting point for every maintenance strategy it builds.

Reliability engineering tools and software

ReliaSoft is the industry-standard suite. HolisticAM is the exclusive AU/NZ distributor:

• Weibull++ for life data analysis
• BlockSim for reliability block diagrams and system simulation
• RCM++ for structured RCM analysis
• XFMEA for FMEA/FMECA management
• XFRACAS for failure reporting and corrective action tracking

Reliability engineering in mining

Mining presents demanding challenges: remote locations, extreme duty cycles, and assets worth $5M-$50M. Typical applications include FMECA for haul trucks and excavators, operational readiness studies, RAM analysis, critical spares determination, and root cause analysis of repeat failures.

HolisticAM’s mining engagements in Australia have covered assets from large wheel loaders to electric rope shovels across gold, copper and iron ore operations, and its senior team came up inside Rio Tinto, BHP, Alcoa and MMG before doing this work for clients.

Reliability engineering without the headcount

Not every operation can justify a full-time reliability team, and many that have the seat find it consumed by breakdowns, shutdowns and audits before any analysis happens. A managed reliability service contracts the function rather than the projects, with the analysis delivered on a cadence and the improvement register owned by someone. See what a managed reliability service is for how the model works and what it costs against an in-house engineer.

HolisticAM runs this model for Australian sites through its Reliability Operating Centre, with the analysis delivered on a monthly cadence and the improvement register owned by a named engineer.

How to build a reliability engineering program

1. Assess your current state. Measure reactive ratio, identify top 10 failure cost drivers, quantify downtime.
2. Start with critical assets. Conduct FMECA on your 5-10 most critical assets.
3. Build condition monitoring. Implement CBM for failure modes where degradation is detectable.
4. Close the loop. Use failure data and RCA to continuously refine strategies.
5. Invest in capability. Train your teams in reliability fundamentals.

For Australian sites, HolisticAM’s Reliability Assessment covers step one: a fixed-scope, fixed-fee measure of what unreliability is costing and which failure modes drive it.

Reliability engineering consulting in Australia

HolisticAM (Holistic Asset Management) provides reliability engineering consulting to mining, rail, utilities and manufacturing operators across Australia and New Zealand, from offices in Maroochydore, Perth and Newcastle.