Hiring the wrong lean consultant is an expensive mistake — not just in fees paid, but in the momentum lost, the scepticism created among your team, and the improvement opportunity that goes unaddressed while you start over with someone else.
The problem is that almost every lean consultant sounds credible in a sales conversation. Everyone talks about “eliminating waste,” “building a continuous improvement culture,” and “delivering measurable results.” The words are the same. The actual capability behind them varies enormously.
Knowing how to choose a lean consultant comes down to asking the right questions — the ones that separate a consultant who will genuinely build your team’s capability from one who will run a few workshops, collect a fee, and leave you exactly where you started once the engagement ends.
This guide gives you 10 direct questions to ask any lean consultant before you sign an agreement — along with what a strong answer sounds like, and what should make you walk away.
Table of Contents
- 1. Quick Answer: What Separates a Good Lean Consultant from a Weak One
- 2. Before You Ask Anything: Know What You Actually Need
- 3. The 10 Questions to Ask
- 4. Red Flags That Should Make You Walk Away
- 5. Green Flags That Signal a Strong Consultant
- 6. Comparing Proposals: What to Weigh Beyond Price
- 7. What a Genuinely Good Engagement Looks Like
- 8. Frequently Asked Questions
- 9. Conclusion
1. Quick Answer: What Separates a Good Lean Consultant from a Weak One
The single biggest differentiator, according to experienced practitioners in the field, is whether a consultant is building your team’s capability or building your dependency on them.
A strong lean consultant:
- Starts by observing and listening, not by pitching a pre-packaged programme
- Customises their approach to your specific operation, not a one-size-fits-all template
- Coaches your leaders to sustain improvement after the engagement ends
- Can point to measurable, verifiable results from previous clients
- Is honest that lean improvement takes discipline and time — not instant transformation
A weak lean consultant:
- Leads with a generic methodology deck before understanding your business
- Promises fast, dramatic transformation with minimal effort from your team
- Delivers workshops and reports but no lasting change in how your people work
- Cannot provide verifiable case studies or references
- Creates ongoing dependency rather than internal capability
The 10 questions below are designed to reveal which type of consultant you are actually talking to.
2. Before You Ask Anything: Know What You Actually Need
Before evaluating any consultant, get clear on your own starting point. This shapes which questions matter most and how to judge the answers.
Ask yourself:
- Are we looking for a short, focused intervention (a lean assessment or a single kaizen event) or a longer transformation programme?
- Do we already have internal lean capability, or are we starting from zero?
- Is our biggest problem operational (waste, lead time, quality) or cultural (lack of engagement, resistance to change)?
- What does success actually look like for us — in numbers, not just intentions?
A consultant who asks you these same questions before proposing anything is already demonstrating good practice. A consultant who skips straight to a fixed programme without asking is a warning sign.
3. The 10 Questions to Ask
Question 1: What quantifiable results have you delivered for clients like us?
What to listen for: Specific metrics — lead time reduction percentages, defect rate improvements, cost savings figures — not vague claims like “significant improvements.” A credible consultant should share concrete, verifiable numbers from real engagements, ideally in your industry or a comparable one. Red flag: Generic answers with no numbers, or numbers they cannot explain how they were measured.
Question 2: Do you start with observation before recommending anything?
What to listen for: A genuine consultant begins by walking your operation, reviewing your data, and talking to your frontline staff before proposing a solution — going to the “gemba,” the actual place work happens. Red flag: A consultant who proposes a fixed programme or price before ever setting foot in your workplace.
Question 3: How do you customise your approach to different organisations?
What to listen for: While lean principles are consistent, the applied solutions should be unique to your facility, your culture, and your specific constraints. Ask for an example of how they adapted their approach for a previous, different client. Red flag: The same programme, deck, and price structure regardless of what industry or problem you describe.
Question 4: How will you build our internal team’s capability, not just deliver a project?
What to listen for: A strong consultant explicitly plans for capability transfer — training your people, coaching your leaders, and designing the engagement so your organisation can sustain and extend improvements independently after they leave. Red flag: Vague answers, or an engagement structure with no training or coaching component at all.
Question 5: How do you help leaders sustain improvement after the engagement ends?
What to listen for: Specifics — daily management systems, gemba walk coaching, standard work, visual management, leader habits. Lean transformation requires consistent leadership behaviours, not just technical tools. Red flag: An answer that focuses only on what happens during the engagement with nothing said about what happens after.
Question 6: Can we speak with a current or recent client reference?
What to listen for: A willingness to connect you directly with a past client — not just written testimonials on their website, which are curated marketing content. Red flag: Reluctance, excuses, or only offering testimonials they control rather than a direct conversation.
Question 7: What accreditation or qualifications do your consultants hold?
What to listen for: Genuine credentials — Lean Six Sigma Black Belt or Master Black Belt certification, relevant industry experience, and ideally delivery through a registered training organisation (RTO) if national accreditation matters to you. You can verify RTO status directly on training.gov.au. Red flag: Vague claims of expertise with no verifiable credentials behind them.
Question 8: What does your engagement process actually involve, step by step?
What to listen for: A clear structure — assessment, prioritisation, implementation, capability building, sustainment — with realistic timelines for each phase. For a detailed breakdown of what a well-structured engagement should look like, see our guide: Lean Manufacturing Consulting in Australia: What to Expect and What It Costs. Red flag: A vague, single-phase description ("we'll come in and fix it") with no clear methodology.
Question 9: How do you price your engagement, and what is included?
What to listen for: Transparent pricing with a clear scope — what is included (assessment, implementation, training, follow-up) and what is not. Ask directly whether the price changes if the engagement scope needs to adjust. Red flag: Pricing that seems unusually low for the promised scope, or structures with unexplained additional fees that only surface after you sign.
Question 10: What happens if the engagement doesn’t deliver the results we expected?
What to listen for: An honest, realistic answer. Lean improvement requires discipline, participation from your team, and time — a credible consultant will be upfront about what it takes to create sustainable change. Red flag: Overconfident guarantees of dramatic, instant results with minimal effort required from your organisation.
4. Red Flags That Should Make You Walk Away
No site visit or observation before proposing a solution
Any consultant who proposes a fixed programme and price without first observing your operation does not understand lean fundamentals — or is not interested in applying them to your actual situation.
Cannot name a single specific, verifiable result
If a consultant cannot point to a real client engagement with measurable, checkable outcomes, you have no evidence they can deliver for you.
Promises fast, dramatic transformation with minimal team effort
Lean improvement requires genuine discipline and consistent participation from your people. Any consultant who promises otherwise is either inexperienced or misleading you.
Same fixed programme regardless of your industry or challenge
Lean principles are universal; solutions must be specific. A consultant applying an identical template to every client is not genuinely practising lean.
No plan to build internal capability
If the engagement structure is all consultant-delivered work with no training or coaching component, you will not retain the skills to sustain improvements after they leave.
Reluctance to provide a direct client reference
Written testimonials on a provider’s website are curated. A consultant unwilling to connect you with a past client who can speak directly has something to avoid.
5. Green Flags That Signal a Strong Consultant
Asks more questions than they answer in the first conversation
Genuine curiosity about your specific situation — your operation, your team, your constraints — before proposing anything is a strong signal of a consultant who will actually customise their approach.
Talks about your team’s capability, not just their own delivery
A strong consultant frames the engagement around what your people will be able to do independently after it ends — not just what the consultant themselves will deliver.
Offers to connect you directly with a past client
Proactively offering references — not just testimonials — signals confidence in their track record and transparency about their results.
Gives a realistic, honest timeline
Including where results will be slower to materialise. Credible consultants do not promise 90-day total transformation — they give you a realistic picture of what 90 days can achieve and what takes longer.
Has verifiable credentials and a transparent track record
Nationally accredited training delivery, relevant certifications, and a track record you can independently check — not just marketing claims on their own website.
6. Comparing Proposals: What to Weigh Beyond Price
When comparing multiple lean consultant proposals, resist the temptation to default to the lowest price. Weigh these factors together:
| Factor | What to Compare |
| Scope clarity | Is exactly what’s included clearly defined, or vague? |
| Capability transfer | Does the proposal include training and coaching for your team, or just consultant-delivered work? |
| Track record | Are results specific and verifiable, or generic marketing claims? |
| Accreditation | Are credentials checkable — through training.gov.au or a recognised certifying body? |
| Timeline realism | Does the proposal set honest expectations, or promise unrealistic speed? |
| Fit with your culture | Did the consultant demonstrate they understand your specific operation, not a generic template? |
| Total cost transparency | Is the full cost — including any follow-up or extension fees — clearly stated upfront? |
For a full breakdown of what lean consulting typically costs across different engagement types in Australia, read our guide: Lean Manufacturing Consulting in Australia: What to Expect and What It Costs.
7. What a Genuinely Good Engagement Looks Like
A well-run lean consulting engagement typically follows this structure:
Assessment
The consultant observes your operation, reviews your data, and talks to your frontline staff before recommending anything — often using value stream mapping to make current waste visible.
Prioritisation
Improvement opportunities are ranked by impact and feasibility — not addressed randomly or all at once.
Implementation
Changes are implemented alongside your team, using tools like 5S, standard work, and focused kaizen events — delivering measurable results during the engagement, not just recommendations for later.
Capability Building
Your leaders and improvement champions are trained — often through Lean Six Sigma Green Belt or the nationally accredited Certificate IV in Competitive Systems and Practices (MSS40322) — so your organisation can sustain and extend the improvements independently.
Sustainment
Regular follow-up, audits, and leadership gemba walks maintain the gains and identify the next priority — rather than the consultant simply disappearing once the initial project ends.
Ready to Ask Us These Questions?
Efficiency Works has been delivering lean consulting and nationally accredited training to Australian organisations since 2007. We welcome every question in this guide — ask us directly, and compare our answers against any other consultant you are considering.
8. Frequently Asked Questions
How do I know if a lean consultant is legitimate in Australia?
Check their credentials directly. If they claim national accreditation or RTO status, verify it on training.gov.au. Ask for specific, verifiable results from previous clients and request to speak with a reference directly rather than relying only on website testimonials.
Should I choose the cheapest lean consulting proposal?
Not automatically. Very low-cost proposals often lack a capability-building component, meaning your organisation may not retain the skills to sustain improvements after the engagement ends. Weigh scope, track record, and capability transfer alongside price — not price alone.
What is the single most important question to ask a lean consultant?
How they will build your team’s internal capability to sustain improvement after the engagement ends. This question reveals whether the consultant is genuinely trying to make themselves unnecessary over time, or building ongoing dependency on their services.
How long should a lean consulting engagement take?
It depends on scope. A focused assessment or kaizen event can take 3 to 5 days. A comprehensive implementation programme typically runs 3 to 12 months. Be wary of any consultant promising complete transformation faster than that timeline realistically allows.
Is it normal for a lean consultant to ask to observe our operation before proposing anything?
Yes — this is a strong positive sign, not a delay tactic. Genuine lean consultants start with observation and data review (often called going to the “gemba”) before recommending any specific approach, because effective solutions must be tailored to your specific operation.
Can a lean consultant guarantee specific results?
Be cautious of any consultant offering guaranteed, dramatic results with minimal effort required from your organisation. Lean improvement is powerful but requires genuine discipline, participation from your team, and realistic time. A credible consultant will be honest about what it actually takes rather than overpromising.
