15 Top Manufacturing Due Diligence Consulting Firms (2026)

Boston Consulting Group

Typical Manufacturing Deal Size: $1B+

Best for: Industrial transformation and cost optimization at scale

Location: Boston, MA

Manufacturing diligence is just one pillar of BCG’s robust, analytics-driven diligence framework, where they blend strategy, operations and value creation into a single, comprehensive workstream. By examining manufacturing performance, supply chain resilience, cost structure and root causes, the firm determines whether the target’s business plan is achievable. Their diligence assesses current performance levels and determines if operations can be optimized to create value.

What sets BCG’s manufacturing diligence apart is its focus on connecting operational insights to impact on the deal. They pay special attention to identifying opportunities to optimize internal operations, including production, procurement and network and design, and highlight execution risks that could undermine synergies.

McKinsey & Company 

Typical Manufacturing Deal Size: $1B+

Best for: Global manufacturing strategy and full-scale operational transformation

Location: New York, NY

Manufacturing due diligence is one element of McKinsey's approach to strategy-led diligence. McKinsey views operations issues as the drivers of value in M&A transactions, not the reason for doing them. First, they work with clients to develop their M&A strategy blueprint that's linked to long-term strategy. Then they look at whether the target's operations (including manufacturing and supply chain) have the capability to execute against that strategy.

McKinsey evaluates cost structure as well as key drivers such as procurement, labor productivity and production performance. They also analyze pricing and commercial levers to gain a full understanding of the risk/reward profile. Finally, McKinsey works to incorporate operational due diligence into value creation planning and pinpoint opportunities for improvement to be implemented through the operating plan from day one.

L.E.K. Consulting

Typical Manufacturing Deal Size: $300M-$2B

Best for: Commercial diligence for industrial and niche manufacturing markets

Location: Boston, MA 

Approaching manufacturing due diligence from an operationally and commercially integrated perspective, L.E.K. places particular emphasis on validating downside risks as well as upside value drivers. As part of its broader M&A due diligence services, this involves triangulating market insight with a bottom-up assessment of the target’s operational capabilities to determine whether its manufacturing and supply chain organizations are capable of supporting growth and margin expectations.

From production performance to cost position and supplier landscape, L.E.K. will challenge assumptions that underpin your investment thesis. With a focus on quantifying top-line growth and cost reduction opportunities, as well as identifying operational risks that may impact value or deal success, L.E.K. always connects manufacturing due diligence insights back to deal economics to validate value-creation potential.

Oliver Wyman

Typical Manufacturing Deal Size: $300M-$2B

Best for: Industrial performance improvement and sector-specific strategy

Location: New York, NY

‍Oliver Wyman's global manufacturing due diligence experience is rooted in operations- and risk-oriented thinking. Industrial performance and supply chain fundamentals can affect value directly in M&A transactions. As part of its M&A services, Oliver Wyman evaluates targets throughout their operating model. From procurement through production and distribution, they bring deep industry expertise and diagnostic analytics to bear.

The firm evaluates manufacturing productivity and cost bases and suppliers, identifying structural issues that may be driving or obscuring performance. Its diligence is tied directly to the investment thesis and can help investors determine whether plans for value creation are realistic given operational realities.

Alvarez & Marsal

Typical Manufacturing Deal Size: $100M-$1B

Best for: Operational due diligence and rapid EBITDA improvement

Location: New York, NY

Few M&A advisors understand manufacturing due diligence from an execution perspective like Alvarez & Marsal (A&M). A&M’s operational due diligence is rooted in its unique and unparalleled execution capabilities. The firm evaluates whether the target’s manufacturing and supply chain are capable of executing against the forecasted financial performance. It turns the business plan into operational must-haves and identifies gaps early in the deal process.

Beyond sizing manufacturing and supply chain efficiencies, working capital, and production costs, A&M quantifies EBITDA adjustments, liabilities and operational risks that could impact valuation and tie diligence back to value improvement opportunities..

FTI Consulting

Typical Manufacturing Deal Size: $100M-$1B

Best for: Complex deals requiring operational, financial, and restructuring insight

Location: Washington, DC 

‍FTI's transaction support uses an integrated risk-based approach combining financial, operational, and strategic due diligence in one engagement. Supporting investors from deal inception through completion, FTI conducts comprehensive due diligence on operations, costs and commercial opportunity.

FTI not only uncovers opportunities to add value but also identifies risks that could negatively impact deal value. FTI looks beyond traditional due diligence and utilizes its team of operations, technology, human capital and regulatory experts to identify risks that could impact deals on numerous fronts. In particular, with respect to manufacturing due diligence for mergers and acquisitions, operational excellence and supply chain are typically directly tied to deal value.

Kroll

Typical Manufacturing Deal Size: $100M-$1B

Best for: Risk-heavy or cross-border manufacturing transactions

Location: New York, NY

‍Kroll's manufacturing due diligence services are risk-based and transaction focused, supported by financial, operational and extensive compliance capabilities. Kroll offers M&A due diligence and transaction support services including both buy-side and sell-side assistance with middle-market industrial and manufacturing transactions. This helps clients identify potential targets during the strategic planning and transaction process.

Financial due diligence, operational due diligence and tax structuring are just some of the thorough diligence services Kroll offers to help investors gain a complete understanding of a target's performance and any potential risks. In the area of manufacturing transactions, this includes reviewing costs, working capital, and operational efficiencies along with market and valuation concerns to ensure appropriate pricing.

TriVista

Typical Manufacturing Deal Size: $50M-$500M

Best for: Hands-on manufacturing diligence and value creation execution

Location: Irvine, CA 

‍TriVista's approach stands out for its operator-led execution focus, anchored by its proprietary Quality of Operations™ (QofO) due diligence methodology with extensive industrial M&A experience across functions. Beyond validating P&L lines, TriVista digs into how the business is operated at the plant and supply chain level to understand what drives reported financial results. 

This includes reviewing underlying data sets, as well as visiting the factory and conducting interviews with operations management. TriVista’s operator-led teams are focused on actionable takeaways and exit with a plan to realize margin expansion, footprint optimization and supply chain improvements that can be executed on day one after closing. 

TBM Consulting Group

Typical Manufacturing Deal Size: $50M-$500M

Best for: Lean manufacturing transformation and shop-floor optimization

Location: Morrisville, NC

‍TBM Consulting Group, a manufacturing and supply chain expert firm, approaches diligence from the perspective of how a business is run rather than checking the boxes of traditional diligence. Looking at everything from the factory floor to the supplier base, TBM evaluates production/supply chain performance and operational discipline to see if the way a business is being run is substantiating the investment thesis.

Not only do they identify issues, they quantify tangible value drivers (usually lean manufacturing, capacity, labor productivity and supply chain related) and translate them into a plan for improvement. The firm often stays engaged with the client post-close to drive change and realize EBITDA acceleration while building operational discipline.

Riveron

Typical Manufacturing Deal Size: $50M-$500M

Best for: Integrated financial diligence with operational alignment

Location: Dallas, TX

‍Riveron’s approach to manufacturing due diligence combines operational, financial and strategic review in a single diligence stream. Riveron focuses on how the business actually operates, including the people, processes and systems behind functions such as manufacturing and supply chain, and connecting those factors to their impact on future EBITDA and cash flow.

Rather than simply explaining past results, Riveron helps buyers understand key insights before the deal so they can make informed decisions and prioritize value drivers before closing. From identifying operational risks that could hinder future performance, such as supply chain constraints, capacity restrictions or inefficient processes, to recognizing opportunities that can increase performance and accelerate value realization after closing.

Baker Tilly

Typical Manufacturing Deal Size: $25M-$250M

Best for: Mid-market financial diligence with industry context

Location: Chicago, IL

‍Baker Tilly recognizes that manufacturing due diligence in M&A transactions requires a cross-functional approach. Their manufacturing due diligence is focused on identifying transaction risk and validating financial performance. They also look for opportunities to identify synergy potential and determine how sustainable performance has been. When reviewing manufacturing transactions, this typically involves a review of cost structure, margin drivers and operational efficiency.

What else separates Baker Tilly’s manufacturing diligence is its perspective on the entire transaction. Combining industry and operational expertise with niche capabilities in IT, tax and compliance diligence, the firm is able to look at your manufacturing business from every angle.

Plante Moran

Typical Manufacturing Deal Size: $25M-$250M

Best for: Lower middle-market manufacturing diligence with operational awareness

Location: Southfield, MI

‍Plante Moran approaches manufacturing diligence for mergers and acquisitions with a comprehensive, middle-market-focused strategy. They combine financial, operational and commercial due diligence into one efficient due diligence process with a focus on manufacturing. Their manufacturing due diligence capabilities are informed by their team’s extensive industry experience in the industrial sectors, where deal success is particularly dependent on operational execution as well as the underlying cost structure and supply chain performance.

Manufacturing due diligence uncovers risks such as underinvestment or constrained scalability and identifies opportunities for optimization. The Plante Moran team strives to tie these opportunities back to value creation plans, linking diligence efforts with plans for post-close enhancements such as procurement, inventory optimization and operational improvements.

Capstone Partners

Typical Manufacturing Deal Size: $25M-$250M

Best for: Lower middle-market industrial deal sourcing and execution

Location: Boston, MA

‍Capstone Partners approaches manufacturing due diligence from an investment banking and market intelligence perspective with a focus on middle market M&A. The Industrials Investment Banking group works on both buy and sell-side transactions, which enables Capstone Partners to gain subject matter expertise in manufacturing subsectors such as metals, packaging, HVAC, and industrial services.

Capstone Partners works with manufacturers of highly engineered products and specialty industrial services to provide investors and owners with insight into their strategic position, growth prospects and value drivers prior to pursuing or completing a transaction.

Eton Venture Services

Typical Manufacturing Deal Size: $25M-$250M

Best for: Fast, flexible diligence for sponsor-backed and time-sensitive deals

Location: Austin, TX

‍Eton Venture Services’ philosophy when it comes to manufacturing diligence for M&A purposes is a customized, senior team member focused process which enables the firm to provide rapid, accurate and defensible due diligence.

This is particularly valuable in transactions where buyers are likely to question forecasts related to production efficiency, margin expansion and supply chain stability. Eton Venture Services customizes its diligence to the specific drivers of each industry and thinks ahead to what concerns a buyer may have, answering them before they are asked.

What is Manufacturing Due Diligence? 

Manufacturing diligence examines how a company manufactures and delivers its product. It starts with plant-level metrics such as throughput, capacity, downtime and overall equipment effectiveness to determine whether current production levels are sustainable. It then analyzes cost of goods sold (COGS), including labor, materials and overhead to see how margins are really being created.

It also assesses the production supply chain. Does the company have a high percentage of suppliers in one country? Long lead times? High levels of inventory? What are its exposures to supply chain risk? In addition to current operations, diligence includes an assessment of equipment conditions, maintenance practices and future capex requirements.

The goal is to connect the dots between the operational realities on the ground and the assumptions being used for deal making. Can the company really achieve its projected performance? What is preventing production from being higher? What opportunities are available to improve performance after closing?

Manufacturing Due Diligence vs. Operational Due Diligence

Operational due diligence focuses on the daily operations of a company. This can include people, processes, systems and execution overall. The goal is to see if the company can reach its financial projections and identify areas of risk/opportunity.

Manufacturing due diligence falls under the umbrella of operational due diligence. It focuses more specifically on the performance of production/supply. This can include metrics at the plant level, capacity & utilization, equipment health, throughput, supplier performance, etc. Manufacturing due diligence almost always includes plant tours and site visits, a step BluWave and DealRoom both cite as essential, to review production data first-hand and interview plant management and operators.

Operational due diligence allows you to understand the risk in execution. Manufacturing due diligence specifically focuses on where value is created in industrial companies: the manufacturing floor.

Regulatory, environmental, and ESG diligence

Regulatory and ESG diligence is increasingly material in manufacturing M&A. Phase I and Phase II environmental site assessments are standard for owned facilities and any site with historical industrial use. Export-control and tariff exposure has become a flashpoint since the 2025 US-China tariff changes; review supplier country concentration and HTS classification. OSHA and safety records are predictive: high recordable incident rates often correlate with broader operational discipline gaps. For cross-border deals, factor in EU CSRD reporting obligations and California's emerging climate disclosure rules.

Here is how manufacturing due diligence compares to the three other diligence types most commonly run on industrial deals:

How Manufacturing Due Diligence Impacts Deal Value 

Manufacturing diligence impacts deal price, structure and execution. Shop floor realities can lead to revisions to EBITDA, working capital or CapEx assumptions that move valuation. If there are risks related to maximum production capacity, operating inefficiencies or supply chain instability, price renegotiation or structuring protections into the deal may be possible.

Due diligence also proves or disproves portions of the investment thesis. Investors can see if the growth and margin expansion plans are supported by underlying operations. Additionally, it can identify tangible opportunities (cost reductions, throughput improvements, procurement savings) to include in post-close value creation plans.

Manufacturing diligence turns assumptions into facts, helping buyers to avoid overpaying and setting the stage for value creation.

Manufacturing Due Diligence Process

Typically, due diligence begins at a high level and works down into the nuts and bolts of the operations. The goal is to quickly understand how a business makes its product(s), validate key assumptions and identify any value impacting risks/opportunities.

The following is a standard list of steps in the manufacturing due diligence process:

1. Review financials and operating data

Review what is presented in financials and operating data to get a high level view of production output, margins and capacity. Identify early concerns and assumptions you will want to validate.

2. Interview management and plant team members

Speak with management and the individuals who are actually running the plants. Learn how day-to-day operations work. How is production planned? What constraints are faced? How are suppliers managed? How is performance tracked?

3. Conduct plant visits and tour facilities

See the operation for yourself. Visit key production facilities and walk the plant floor. Validate what you’ve been told and get a feel for workflow, equipment maintenance needs, how labor is being utilized, etc.

4. Analyze operations metrics

Analyze how the business is running from a production perspective. Understand throughput, downtime, yield, capacity utilization, labor usage, and how costs are broken down between labor, materials and overhead.

5. Evaluate supply chain

Evaluate suppliers and supply chain practices. How long do supplier lead times tend to be? How much inventory is being kept on hand? What does logistics look like? Are there any concentration risks or bottlenecks?

6. Review capital equipment and scalability

What is the age of the equipment? How does maintenance currently look? Are there any constraints on the ability to scale? Will additional CapEx be needed to grow or can you grow with the existing footprint?

7. Identify risks and opportunities

Clearly define operational risks that may impact value in the transaction. What opportunities are there to improve efficiency, cut costs and increase output?

8. Connect findings to deal thesis

Connect your findings to the overall thesis for the deal. Validate/invalidate your projected assumptions and identify next steps for creating value post-close.

For a structured way to manage the manufacturing diligence process, download our Manufacturing Due Diligence Checklist. 

How to Choose the Right Manufacturing Due Diligence Consulting Firm

Not all consulting firms operate alike when conducting manufacturing due diligence. Finding the right fit for you will depend on many factors including deal size, timing and where key risks lie within the business.

Here are a few things to consider when trying to narrow down your list of firms and select the one that will work best with your company.

Deal size

Make sure the firm you choose can handle your deal size. Larger cap deals may need more global firms with deeper resources and sector coverage while middle-market and lower-middle-market transactions can benefit from firms with a more execution driven culture.

Operational expertise

Look for firms that have actual manufacturing experience at the plant level. Ideally these teams should have former operators and engineers who understand how to identify problems that aren’t found in financials and datasets.

Depth vs. speed

Every deal team feels pressure to work within short time frames. If you find yourself in a rushed situation consider firms that will provide smaller, senior driven teams that can move quickly. For larger and more complex deals consider a larger team with deep functional experts.

Value creation

Root cause problem solving is important, but make sure the firm you choose will help you tie findings to specific actions you can take post-close to create value.

On-site availability

Due diligence in manufacturing almost always requires on-site visits to both operations and facilities. Make sure the firm you choose is willing to spend real time on the plant floor rather than behind a spreadsheet.

Integration & post-close resources

If you require assistance beyond diligence, weigh firms based on their ability and interest in staying engaged to help with execution after close.

How to evaluate the quality of a diligence report

A useful diligence report does five things: identifies specific EBITDA bridges with named drivers and quantified value impact (not generic ranges); names key suppliers and their concentration percentages; includes plant-by-plant capacity utilization tables; surfaces named operational risks tied to dollar values; and ends with a 30, 60, and 90-day post-close action plan. If the deliverable lacks any of these, push back during the engagement.

Industry focus

Finally, look for firms with experience in your specific manufacturing vertical. Whether it’s automotive, industrials, electronics, etc., firms with niche industry experience can often gain insights and benchmark data faster.

Firms with strong post-close value-creation track records

Some firms on this list specialize in post-close value creation, not just diligence findings. TriVista's operator-led teams build day-one execution plans for margin expansion. TBM Consulting Group often stays engaged after close to drive EBITDA acceleration. Alvarez and Marsal turns the business plan into operational must-haves and identifies execution gaps early. Bain frames this as "assured value capture" with integration considered during diligence. If post-close execution is a priority, prioritize firms with operator backgrounds and a stated post-close model.

Frequently Asked Questions

How long does manufacturing due diligence take?

Manufacturing due diligence typically takes 4 to 12 weeks for a single facility, and 60 to 90 days for multi-site or global manufacturers, a range DealRoom's own Manufacturing Due Diligence Guide also cites. Timing varies based on operational complexity, the number of facilities being reviewed, and availability of information. 

More sites and deeper dives will take longer. Global manufacturing businesses will typically require more time to complete due diligence. Site visits will also add time to the process.

How much does manufacturing due diligence cost?

Manufacturing due diligence costs vary by deal size and scope. Lower middle-market focused-scope diligence typically runs $25,000 to $75,000. Mid-market full-scope engagements range from $75,000 to $250,000. Large-cap, multi-site engagements with global supply chain reviews can run $250,000 to $1,000,000 or more. Private equity buyers usually expense diligence to the deal; corporate buyers absorb it as a transaction cost.

Who conducts site visits for manufacturing due diligence? 

Site visits should be conducted by someone with hands-on experience in managing or advising a plant operation. This could be an operational due diligence consultant, manufacturing engineer or subject matter expert in your industry.

Private equity firms and strategic buyers typically hire a third party advisory firm to lead the assessment and have members of the internal deal team support the visits.

What information do you need to perform manufacturing due diligence? 

You’ll want to gather production volumes, utilization vs. capacity, equipment lists, maintenance history, labor costs, supplier/ procurement information, inventory turns, quality scores (i.e. defects), and health and safety records. You’ll also want any financial information that ties back to the operation team such as COGS and margin by product/service line.

How do you analyze manufacturing capacity? 

In order to evaluate capacity, you must look at current levels of production versus the maximum amount of production that can be reasonably achieved during normal business hours. This includes reviewing equipment capabilities, shift schedules, downtime, bottlenecks, labor constraints, and overall equipment effectiveness.