How do I evaluate whether a reliability engineering consultant is credible and unbiased for maintenance strategy decisions?

To evaluate whether a reliability engineering consultant is credible and unbiased for maintenance strategy decisions, look for evidence in five areas: technical competence, independence, decision process, commercial incentives, and track record.

1) Check technical credibility

Ask for proof they can do the work, not just talk about it.

Good signs

• Relevant engineering/reliability credentials
• Direct experience in your asset type, failure modes, and operating environment
• Familiarity with tools like:
  • FMEA/FMECA
  • RCA
  • RCM
  • Weibull/statistical reliability analysis
  • condition-based/predictive maintenance
  • maintenance optimization
• Ability to explain methods clearly and defensibly

Ask

• “What similar assets have you worked on?”
• “What maintenance strategy changes have you recommended, and what were the results?”
• “Can you show examples of analyses, not just summaries?”

2) Test for bias and conflicts of interest

A consultant can be technically strong but still biased toward a preferred solution.

Red flags

• They sell software, inspections, parts, sensors, CMMS, or contracting services tied to their recommendations
• They always recommend the same maintenance approach
• They dismiss alternatives without analysis
• They can’t separate facts from assumptions
• Their fee depends on implementing a particular solution

Ask

• “Do you have any financial ties to vendors, contractors, or software providers related to your recommendations?”
• “Do you receive referral fees, commissions, or implementation incentives?”
• “What alternatives will you evaluate before recommending a strategy?”

A credible consultant should disclose conflicts openly and put them in writing.

3) Evaluate the rigor of their decision process

You want a consultant who uses a structured, transparent method rather than intuition.

Look for

• Clear asset criticality assessment
• Failure mode analysis
• Risk-based prioritization
• Cost/benefit tradeoffs
• Assumptions documented
• Sensitivity analysis for uncertain inputs
• Recommendations tied to measurable outcomes

Ask

• “How do you decide whether to use preventive, predictive, run-to-failure, or redesign?”
• “How do you handle missing or poor-quality maintenance data?”
• “What assumptions drive your recommendation most strongly?”

A trustworthy consultant can show how the recommendation would change if assumptions change.

4) Check independence of judgment

They should be willing to tell you when the best answer is “do less,” “redesign,” or “the current strategy is already good enough.”

Good signs

• They challenge client assumptions
• They are comfortable saying “no action is justified”
• They recommend targeted pilot tests before large-scale rollout
• They distinguish between engineering need and organizational habit

Ask

• “Tell me about a time you advised against more maintenance.”
• “When have you recommended redesign instead of more PM?”
• “How do you avoid over-maintaining equipment?”

5) Verify track record and references

Past behavior is often the best indicator.

Ask for references from

• Similar industries
• Similar asset types
• Clients who did not buy a large software/implementation package from them

Ask references

• “Was the consultant balanced and evidence-based?”
• “Did they consider multiple options?”
• “Did their recommendation survive operational scrutiny?”
• “Were there any hidden incentives?”

6) Examine deliverables before hiring

Before signing a long engagement, ask for a sample of their work product.

A strong report usually includes

• Asset context and scope
• Data used and limitations
• Failure mode logic
• Alternatives considered
• Ranking criteria
• Financial and operational impacts
• Assumptions and uncertainties
• Clear recommendation and rationale

If the output is just a list of tasks with no reasoning, that’s a problem.

7) Use a structured procurement process

To reduce bias, compare consultants using the same criteria.

Create a scorecard

• Relevant experience
• Analytical rigor
• Independence/conflict disclosure
• Ability to explain tradeoffs
• References
• Price transparency
• Transfer of knowledge to your team

Avoid selecting solely on lowest price or biggest brand.

8) Ask for a small pilot or diagnostic phase

A short initial engagement can reveal a lot.

Good pilot outcomes

• Transparent method
• Practical insights
• Balanced recommendations
• Clear distinction between immediate actions and long-term changes

If the consultant pushes immediately for a major program overhaul, that’s worth questioning.

9) Watch for language patterns

Potential warning phrases

• “This is the only right way”
• “Everyone should do predictive maintenance”
• “Trust me, I’ve seen this before”
• “You don’t need the data”
• “We can optimize everything quickly”

A credible consultant will usually say:

• “It depends”
• “Here’s what the data supports”
• “Here are the tradeoffs”
• “This recommendation is sensitive to these assumptions”

10) Put independence requirements in the contract

If this matters a lot, make it explicit.

Include clauses requiring:

• Full disclosure of conflicts of interest
• No commissions/referral fees from vendors tied to the work
• Disclosure of assumptions and limitations
• Ownership of analysis by your organization
• Permission to review methods and data sources
• No requirement to buy their software or services to use the recommendation

Practical interview questions

Here are some of the best:

1. “What would make you change your recommendation?”
2. “What alternatives will you compare?”
3. “Do you have any commercial ties to vendors involved in this space?”
4. “How do you distinguish reliability improvement from maintenance overreach?”
5. “Can you show an example where you recommended less maintenance?”
6. “What data do you need, and what will you do if it’s incomplete?”
7. “How will you quantify uncertainty?”

Bottom line

A credible and unbiased consultant is one who is:

• Technically capable
• Transparent about conflicts
• Methodical and evidence-based
• Willing to challenge assumptions
• Able to recommend against unnecessary maintenance
• Clear about uncertainty and tradeoffs

If you want, I can also give you a one-page consultant evaluation checklist or a scorecard template you can use during interviews.