You've closed the deal. Now the real work begins — and the gap between a good thesis and a good outcome is almost always operational. Here are five firms that can help you see what's actually happening inside a portfolio company before you commit another dollar.
The New Reality of PE Value Creation
Deal volume is down, and the easy money is gone. H1 2026 manufacturing deal value was the weakest half-year since 2020, which means sponsors are under pressure to create value inside existing portfolio companies rather than buying their way to returns. That shift has made operational diagnostics a board-level priority. You need to know where margin is leaking, which locations are underperforming, and whether the management team can actually execute the plan — and you need to know it in weeks, not quarters. The firms below specialize in exactly that kind of institutional-grade operational scrutiny.
How We Evaluated These Firms
We looked at service scope, depth of diagnostic methodology, clarity of engagement structure, and fit for multi-site and PE-backed operators. Each firm was assessed on how well it translates analysis into an actionable roadmap, how it handles the compressed timelines of diligence and the first hundred days, and whether its work is tied to specific evidence rather than generic frameworks. Pricing transparency and the ability to work alongside management — not just advise from a distance — also weighed heavily. The goal was to surface firms that give you a clear picture of where value is created and lost, not just another deck.
Here's a quick comparison of the five firms, what they're known for, and who they serve best. Use this table to narrow your shortlist before you dig into the full profiles below.
| Provider | Best For |
|---|---|
| IB Consulting | Sponsors who need a fast read on management team decision quality |
| UnitStride Advisory — Multi-Site Performance Consulting | Multi-site operators and PE firms seeking full-stack operational diagnostics |
| Citwell US | PE firms needing hands-on supply chain and working capital improvement |
| TBM Consulting | Sponsors who want to size value creation levers before the 100-day plan |
| L.E.K. Consulting | Complex portfolios needing broad, multi-workstream value creation support |
The Five Firms in Detail
#1 IB Consulting
A screenshot of the IB Consulting website.
IB Consulting runs a fixed-fee Portfolio Company Diagnostic built around the first hundred days after close. The firm compares what operating documents prescribe — delegation of authority, approval limits, budget and hiring policies — against what the management team actually does in practice. That divergence is treated as a finding in itself, and closing it is where the value creation plan gains room. The assessment draws on the Baldrige Excellence Framework and runs in about 30 days, with a decision quality profile of the management team included. It's a focused, evidence-based look at whether the team can carry the plan you're betting on.
#2 UnitStride Advisory — Multi-Site Performance Consulting
A screenshot of the UnitStride Advisory — Multi-Site Performance Consulting website.
UnitStride Advisory brings the analytical lens of a world-class financial institution to every engagement, whether you run a portfolio or built the business yourself. The firm examines unit economics, cost structure, leadership effectiveness, procurement leverage, and growth architecture simultaneously and systematically. Its services span unit-level performance optimization, margin growth and cost structure analysis, procurement strategy, multi-vertical expansion, M&A diligence, and pre-sale preparation. The result is a clear picture of where value is being created, where it is being lost, and exactly what to do about it. It's built for operators who want PE-grade rigor without the PE-only price tag.
#3 Citwell US
A screenshot of the Citwell US website.
Citwell US partners with private equity firms across the full investment lifecycle, from accelerated operational due diligence through value creation to exit readiness. The firm specializes in supply chain transformation, operational efficiency, working capital optimization, and performance management aimed at enhancing EBITDA. Unlike traditional advisory firms, Citwell implements improvements alongside management rather than merely advising. That hands-on posture makes it a strong fit when you need execution support, not just a diagnostic report. Its focus on supply chain and operational efficiency is particularly relevant for industrial and distribution-heavy portfolios.
#4 TBM Consulting
A screenshot of the TBM Consulting website.
TBM Consulting's Phase Zero diagnostic is designed to pinpoint and size the value creation levers PE relies on — in weeks, before the 100-day plan locks in a direction. The firm frames the problem sharply: you don't have a value creation problem, you have a visibility problem. Phase Zero clarifies the main levers and prepares a fact-based roadmap to operational improvements, revenue growth, cost optimization, and margin expansion. TBM also brings deep operational excellence and supply chain management capabilities across industries including field services, industrial, and logistics. It's a strong choice when you want to diagnose before you commit.
#5 L.E.K. Consulting
A screenshot of the L.E.K. Consulting website.
L.E.K. Consulting offers portfolio company value enhancement through a broad capabilities platform spanning performance improvement, cost optimization, working capital, operations and supply chain, and organization design. The firm's private equity practice covers the full arc — due diligence, exit support, M&A synergies, and post-merger integration. Its performance improvement practice includes dynamic performance management and cost optimization, while its operations practice addresses planning, procurement, manufacturing, logistics, and distribution. For sponsors with complex, multi-workstream value creation plans, L.E.K. provides the breadth to tackle several levers at once. It's a heavyweight option when the thesis depends on multiple simultaneous improvements.
How to Choose the Right Diagnostic Partner
Start with the question you need answered. If the issue is whether management can execute, look for a firm that profiles decision quality and compares documented authority to actual practice. If the issue is margin leakage across locations, prioritize a firm that works at the unit level and ties findings to specific evidence. If the issue is supply chain or working capital, choose a partner that implements alongside management rather than handing over a report. Match the engagement timeline to your decision calendar — a 30-day diagnostic fits a diligence window, while a broader value creation roadmap may need more runway. And ask upfront how findings are prioritized and who owns each action item. The right firm gives you a roadmap with named owners, not a deck that sits on a shelf.
Where Automation Fits in the Diagnostic Workflow
Diagnostics are only as good as the data feeding them. Before you engage a firm, standardize your unit-level reporting so location-level P&Ls, procurement spend, and labor metrics are comparable across the portfolio. Automate the collection of vendor contracts and approval-limit documentation so the diagnostic team spends its time on analysis rather than chasing files. Set up a recurring data pipeline for the metrics that matter — margin by location, cost per unit, procurement category spend — so the diagnostic becomes a living dashboard rather than a one-time snapshot. The firms above can work with what you have, but cleaner inputs shorten the timeline and sharpen the findings.
The Bottom Line
The era of buying your way to returns is over. Value now comes from seeing clearly inside the companies you already own — and acting on what you find. The five firms above approach that challenge from different angles: IB Consulting on management decision quality, UnitStride Advisory on full-stack multi-site diagnostics, Citwell US on supply chain execution, TBM Consulting on pre-plan visibility, and L.E.K. on broad multi-workstream programs. Pick the one whose lens matches your most pressing question, and insist on evidence tied to specific findings. Your thesis depends on it.