Management consultingFrankfurt · Hamburg · Stavanger · Miami
Operational excellence · worldwide · since 2011

Strategy becomesoperating margin.

Management consulting for operational excellence. For executive teams whose strategy needs to show up in results faster than today.

01 · Levers

Four levers of operating margin.

Cost structure improvement
-15 %
avg. operating cost

Structural cost reduction across plants and functions, without quality loss.

Process acceleration
-40 %
avg. lead time

Order-to-delivery cycle, measured across mandates.

Product design
+30 %
avg. engineering output

Time-to-market and engineering efficiency in industrialisation programmes.

Performance culture
90 %
sustained after 24 months

Effects still in place two years after engagement end.

Source: internal programme database, Q1 2026 · aggregated across mandates.

02 · Positioning

We work where strategy meets operations.

Operational excellence is not a project you purchase. It is a capability your company builds. Our role: shorten the path and make it durable.

01

Industrial depth

We know the mechanics of each industry we work in because we have worked inside it: in plants, on construction sites, in ramp-up projects.

02

Test the assumptions

Every mandate starts from zero. What worked ten years ago is often the problem today. So we test the assumptions first, including our own.

03

Difficult mandates

Ramping four plants in parallel, restructuring while production runs, industrialising a new platform. These are the mandates we get called in for.

03 · Services

Four ways in, depending on where you stand

Which entry point fits depends on your situation. Most engagements start with the assessment.

OpEx Assessment

Eight weeks in which we go through the whole operation, from sales to supply chain. At the end there is an EBIT thesis with numbers behind it and an order in which to realise them.

Diagnostic · quantified business case · delivery path
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Performance

We deliver the programme with your leadership team, on site in the plants. Control, metrics and accountability are set up so that they keep running after we leave.

Anchored programmes · clear accountability · empowered teams
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Industrialisation

Bringing a new product or a new line into series production. We plan ramp-up, supply chain and control together, so that SOP is not the day the problems start.

Ramp-up plan · capacity model · production readiness
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Restructuring OpEx

When sites no longer carry the numbers. First secure liquidity and delivery capability, then rebuild the structure. The first effects usually show within the first quarter.

Stabilisation · performance management · rebuild plan
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Award
Top Consultant 2025, compamedia · WHU

Top Consultant 2025.

Recognised for the third consecutive year by compamedia, based on an independent client survey conducted by WHU Otto Beisheim School of Management.

Lean Group delivers consistently executed transformations with measurable impact in production. Not on slides.

Jury · WHU Otto Beisheim School of Management
04 · How we work

Three things we commit to on every mandate

Every thesis we put forward carries a number. What we commit to at the start of a mandate has to show up in the P&L at month-end. If it does not, the thesis was wrong, and we say so.

For us, recommendations are where the work starts. We stay until the way an operation decides, measures and steers has changed. That takes longer than a report, and it is the reason our effects are still there two years on.

To do that we work with your people in your plants. A programme that only runs while consultants are in the building would not count as a success for us.

Theo Herzog
Managing Partner, Lean Group
05 · Voices

Voices from mandates

“

We had been describing the problem differently than it was for two years. Lean Group understood in eight weeks what was really going on. Six months later the first new launch came in early.

COO · Medical Devices · € 540 M revenue
“

They delivered in 90 days what our own programme had not achieved in two years. With numbers that arrive in the P&L.

CFO · Industrial goods · 9 plants EU+US
“

They worked with our people. Two years after the mandate the new structure carries itself.

Chairman of the executive board · Industrial group
06 · Industries

Industries we work in

Machinery, automotive, retail and supply chain, process plants, medical devices, hospitals. Most mandates are in Germany and Norway, some worldwide. A reference list is available in the first conversation.

07 · Clients

From the client list

Names we are allowed to mention.

Daimler
Linde
Meyer Werft
General Electric
Alstom
Bilfinger
Hochtief
Bauwens
Lidl
AIDA
Becton Dickinson
ALHO Systembau
Hundhausen
IFCO
Oda
Helse Stavanger
Fagsi
VIA Optronics

Further references on request

Contact

Get in touch.

Tell us briefly what it is about. We will come back to you promptly with a first assessment, in confidence.

Germany · HQ
Frankfurt
Lean Group GmbH
Alfred-Herrhausen-Allee 3-565760 Eschborn
Germany
Hamburg
Lean Maritime GmbH
Alter Wall 3220457 Hamburg
Norway
Stavanger
Lean Group AS
Kongsgata 424005 Stavanger
United States
Miami
Lean US LLC
1688 Meridian Ave, Suite 600Miami Beach, FL 33139