@nd3000 | shutterstock.com


Bayer AG Supply Center Leverkusen

"The collaboration with ROI-EFESO was a key success factor in the introduction of an efficiency-oriented, integrated management system. The joint work made it possible to align all areas and levels with common business objectives.

Together, we have achieved impressive results, both in terms of cost efficiency and the operational efficiency of our processes.

Employees at all levels were involved through proactive change management and it considered the individual needs of production, analytics, engineering and management on our journey to operational excellence. The holistic approach is geared towards us as a customer and is designed in such a way that we are empowered as partners to continue the concept ourselves in the long term and shape the change ourselves.

The joint work with ROI-EFESO has been extremely successful in laying the foundations for us to continuously develop into a center of excellence for solids formulation!"

Dr. Carola Pörtner, Head of Supply Center Leverkusen, Bayer AG Supply Center Leverkusen


"Together with ROI-EFESO, we have achieved one of the fastest, most successful and innovative factory transformations. The Bentley team has been a joy to work with and committed to shaping the visible change."

Peter Bosch, Member of the Board, Manufacturing, BENTLEY MOTORS LIMITED

Volkswagen AG

"ROI-EFESO has been supporting Volkswagen in the implementation of the Future Pact since 2017. ROI-EFESO is active both as a consultant to our German plants and in the development and support of an award programme tailored to the component to improve our operational excellence.

The cooperation with ROI-EFESO is perceived as productive at all levels - from the shop floor to top management.

Those responsible from various locations particularly appreciate the constructive, practical and in-depth expertise of the ROI-EFESO consultants in the individual business areas. In 2018, we plan to further expand the cooperation with ROI-EFESO and roll out the jointly designed programmes internationally."

Thomas Schmall, Member of the Board of Management Volkswagen AG, Technology, CEO Volkswagen Group Components

THEVA Dünnschichttechnik GmbH

"After years of research and testing, we have now taken the next step towards industrialising our production. ROI-EFESO supported us in this process as part of the new planning for our future production operation. It was particularly important to us that the solution is future-proof and that changes can be easily integrated into the layout.

The ROI-EFESO consultants fulfilled this requirement to our complete satisfaction. The fact that the layout planning was done in 3D contributed enormously to the understanding of the developed solution. This new plant layout is an important building block for the future viability of our company."

Dr. Werner Prusseit, Managing Director, THEVA Dünnschichttechnik GmbH

Paul Hartmann AG

"In the further development of our PLM process, we have come to appreciate the consultants' working methods and competence. They are characterised by the introduction of best practices, e.g. on quality measures, as well as the equally successful integration of our employees at all hierarchical levels in the analysis and conceptual work.

When it comes to implementation, we value flexibility and responsiveness - without losing sight of the goal. For these reasons, we now work in partnership with the ROI-EFESO consultants in several areas."

Michael Zaiser, Vice President Corporate Quality, PAUL HARTMANN AG

Bayer AG

"We have been working closely with ROI-EFESO at the Supply Center Berlin since 2021 to successfully shape our transformation into a site of excellence for parenteral production at Bayer Pharma.

The management consultancy ROI-EFESO has played a key role in supporting us in developing concepts for organisational, employee and process development and rolling these out together with our internal team. Great importance is attached to the training of employees on the shop floor, the coaching of managers and the sustainability of the initiated change. ROI-EFESO succeeds in speaking the language of both employees and management through its high level of expertise and leadership competence, in order to live the introduced processes and thus realise tangible increases in efficiency.

Already during the implementation of the pilots, the entire organisation began to pull together ("pull effect"), so that the roll-out in the production area was a complete success and we are planning for 2023, together with ROI-EFESO, to extend the concepts to the laboratories and planning in addition to a stabilisation phase in production. In this way, we are setting innovative and sustainable standards for the Bayer Pharma production network."

Dr. Sylvia Anger, Head of Supply Center Berlin, Bayer AG


“We hired ROI-EFESO for a short-term project and were thrilled about how efficiently and structured the colleagues supported us. Despite high intensity, it was always a personally very pleasant and professional cooperation. The results are an excellent basis for further steps.“

Ralf Zajewski, Senior Director, ams OSRAM Group

KraussMaffei Technologies GmbH

"The cooperation with ROI-EFESO in our project "European Operations Footprint" was very professional and opened up valuable perspectives for our team within a short time. I have been particularly encouraged by the open and constructive discussions in which the ROI-EFESO team challenged us right from the start and encouraged them to think fundamentally - and thus purposefully. So we quickly realized that we have the ideal partners for the complex tasks of our project on board.

We are very satisfied with the results: we benefit from a clear and sustainable concept. We can independently apply the procedure for designing a "footprint" to improve or confirm our "footprint". Furthermore, we have achieved a high level of transparency for the appropriate dimensioning of the indirect areas."

Günter Bittner, Head of Industrial Engineering, KraussMaffei Technologies GmbH

Siemens AG

"Increasing the efficiency of our development processes is one of the key components of our innovation strategy. The R&D optimization project carried out together with ROI-EFESO identified significant potential for improvement in R&D processes as well as in overarching organizational issues. Thanks to the early intensive involvement of all employees concerned, we achieved a high level of acceptance in the implementation of the measures derived. The 'Outside In View' and the benchmark comparisons by ROI-EFESO were particularly helpful in the project."

Andreas Matthé, CEO Low Voltage & Products, Energy Management, Siemens AG


"Our ties to ROI-EFESO go back 10 years, with intensive, very close collaboration. I value in particular the high degree of professional expertise and the great level of commitment shown by the consultants. This includes skill in getting matters implemented on the shop floor."

Dr. Herbert Diess, former Member of Board of Directors, BMW AG

ThyssenKrupp AG

"The improvement of the operative performance of our global positioned production network is a key component of the strategic further development of our business area. By means of the project drive, we created structures and processes that are indispensable for operational excellence.
Due to its strength of implementation, branch and methodical expertise, ROI-EFESO has proven to be a competent partner in this project."

Dr. Karsten Kroos, Chairman of the Management Board of the Business Area Components Technology, ThyssenKrupp AG

Jenoptik AG

"We set high demands for external consultants. Everything has to be a perfect fit here: from the know-how of the deployed consultants with regard to operational excellence, to the way in which they collaborate with the various project teams, to the fee model. ROI-EFESO fully met our expectations."

Dr. Ing. Michael Mertin, former Chairman of the Board of Directors, Jenoptik AG

thyssenkrupp AG Materials Services

"With the Operational Excellence program (OPX) we defined our production system of the future. Materials processing, supply chain, warehousing and logistics are in focus.
ROI-EFESO supported us by developing and implementing the OPX program. Especially the strong focus on creating visible results and on striving for operational excellence in all project phases was a key success factor. The ROI-EFESO consultants convinced through deep knowledge on conceptual level as well as on shop floor implementation.”

Joachim Limberg, CEO

Knorr-Bremse SfS GmbH

"ROI-EFESO provided us with crucial support in redesigning PEP for the Systems for Rail Vehicles unit. This challenging consulting work requires extensive knowledge and, above all, a well-designed concept. That is the only way to identify improvements that will stand the test in practice."

Dr. Albrecht Köhler, Member of Management, Knorr-Bremse SfS GmbH


"I read your trend study ‘R&D Landscape 2025’ with great interest and found the content and findings extremely interesting and innovative. I will expand this with my development colleagues and also use the information to further shape our development strategy."

Markus Kolczyk, Vice President Engineering Automotive OEM, MANN + HUMMEL GmbH

SMT Maschinen- und Vertriebs GmbH & Co. KG

"We have a long-standing and extremely constructive cooperation with ROI-EFESO. When designing a new production facility for our latest product, ROI-EFESO’s consultants impressively demonstrated their excellent expertise and in-depth knowledge of factory planning.

The structured and efficient approach as well as the professional and at the same time pleasant cooperation contributed significantly to the fact that we were able to meet our ambitious schedule. Many thanks for the valuable support in our further expansion."

Dr. Christian Ulzhöfer, CEO, SMT Maschinen- und Vertriebs GmbH & Co. KG

HOERBIGER Kompressortechnik GmbH

"Lean management is still one of the key philosophies in the 21st century. With the ROI-EFESO  we had been able to improve our material flow efficiency dramatically. I really appreciate their ability to gap the bridge from creating an idea to realization. ROI-EFESO empowered our project with ideas and structural approach to get it done very fast without leaving our team members alone."

Oliver Gratzel, Head of Business Unit Serial & Industrial / General Manager HKS, Executive Vice President, HOERBIGER Kompressortechnik GmbH

Voith Turbo Power Transmission (Shanghai) Co., Ltd

"I would like to give my thanks to the consultants from ROI-EFESO to support us, especially for the outstanding ability in shop floor management to positively influence and guide supervisors, line leaders and workers alike."

Jeff Yang, Director Production Management

Schlüter Systems

"The fact that we were able to realize such a comprehensive concept that radically changed the processes that we had grown accustomed to over the years, is largely due to the constructive collaboration with the team and to the consultants from ROI-EFESO."

Marc Schlüter, Managing Director Schlüter Systems KG

Lohmann & Rauscher GmbH

"Particularly important for us is the in-depth process know-how in the areas of supply chain management, production and administration as well as the distinct implementation competence. The cooperation with ROI-EFESO works excellently."

Dr. Josef Doppler, former Chairman of the Management Board, Lohmann & Rauscher GmbH

TÜV SÜD Product Service GmbH

"Together, we undertook a strategically important project to redesign the way services are provided in our laboratories. ROI-EFESO consultants understand how to structure processes and make them efficient, and they quickly fit in with the team. Particularly worthy of mention is the way knowledge gained from the manufacturing industry was successfully applied to the processes of a services company."

Joachim Birnthaler, CEO, TÜV SÜD Product Service GmbH, Munich

Dr.-Ing. Ulrich Esterer GmbH & Co. Fahrzeugbauten und Anlagen KG

"ROI-EFESO is just the right partner for our company. We jumped into the methodology of manufacturing with both feet. This wouldn’t have been possible without the consultants' detailed know-how about tool manufacture and their multifaceted experience in production. Equally essential to the success of the project was that the consultants worked in a way that was collegial and open. As a result, the enthusiasm can be seen in the entire team, and not just in management."

Julia Esterer, Geschäftsführerin Dr.-Ing. Ulrich Esterer GmbH & Co. Fahrzeugbauten und Anlagen KG

Miba AG

"For us, ROI-EFESO is a valuable external partner for introducing technical and organizational innovations and spotting trends at an early stage. For this reason, we're continuing to develop an ongoing collaboration."

Dr. Dr. h.c. Peter Mitterbauer, Member of the Board of Directors, Miba AG

Grohe AG

"ROI-EFESO has become an important partner for the successful restructuring of business processes. The special quality of ROI-EFESO lies in it being a blend of “implementer” and “strategizer", and it works so closely with the shop floor that synergies come about between the big players in the automotive sector and medium-sized companies operating worldwide, like Grohe."

Detlef Spigiel, former Member of the Board of Directors, Grohe AG

DB Fahrzeuginstandhaltung GmbH, Fulda

"During a very critical phase, ROI-EFESO helped us to stabilize our production processes and to increase and permanently assure quality.
The close, collegial collaboration was a success and very enjoyable for all involved."

Ewald Klüe, Task Force Head, DB Fahrzeuginstandhaltung GmbH, Fulda

Brose Fahrzeugteile GmbH & Co. KG

"ROI-EFESO supported us in realigning the way our company was organized. In particular, I value the pragmatic, expert, and collegial collaboration, as well as the extensive sector knowledge in the automotive and automotive supplier industry."

Jürgen Otto, Head of Management, Brose Fahrzeugteile GmbH & Co. KG

Fresenius Medical Care Nephrologica Deutschland GmbH / Renal Pharma

"In collaborating with the committed ROI-EFESO consultants, it quickly became apparent that we’d found the right partner. Together, we were able to achieve the set objectives – in spite of a tight schedule."

Dr. Wolfgang Hofmann, Manager, Fresenius Medical Care Nephrologica Deutschland GmbH / Renal Pharma

Miba Friction Group

"Over many years of collaboration, we have come to know and appreciate ROI-EFESO. One of ROI-EFESO´s strengths lies in its process expertise, which comes from broad consulting know-how. ROI-EFESO consultants are well trained and uncomplicated. Decisive for success is the savvy combination of process consulting and expert IT knowledge."

F. Peter Mitterbauer, Manager, Sales & Marketing, Miba Friction Group

Miba Group

"One thing I particularly like about ROI-EFESO is the emphasis on open communication and treating one another fairly. Likewise, the high degree of expertise and the professionalism of the consulting team."

Thomas Meixner, CIO, Miba Group

BMW HamsHall

"ROI-EFESO took an already productive team and made it even better! The collaboration was a lot of fun!"

Brendan McCarthy, Head of Assembly, BMW HamsHall

BMW Leipzig

"ROI-EFESO brings method into the project. No prefabricated solutions are brought in, but individual solutions are developed with system."

Albert Sextl, Leiter Instandhaltung BMW Leipzig

Wallstabe & Schneider

"We are truly satisfied with the project results - with a reasonable amount of effort, a wide-ranging organizational change was well planned and implemented, making us more flexible and efficient."

Christian Wallstabe, Commercial Management / Managing Partner, Wallstabe & Schneider


"In project work, ROI-EFESO consultants quickly got into the details of operation and diligently saw to the development of a long-term approach. That made a believer of everyone.

Thomas Langer, Project Head, Premium AEROTEC

AKW Apparate + Verfahren GmbH

"The introduction of global standards on a best-practice basis was very well received by all involved. Employees around the world are on board with interest and great commitment. Communication between countries has improved decidedly."

Thomas Heckman, CEO, AKW Apparate + Verfahren GmbH

HOERBIGER Kompressortechnik Holding GmbH

"In the project, we were convinced by ROI-EFESO’s use of a combined top-down / bottom-up approach. The consultants were successful in taking the many ideas and creative proposals of the management team and our employees from various countries and giving them, above all, a clear, comprehensible structure in the best possible form. “Teasing out” and channeling the existing creative potential was a particularly important accomplishment of ROI-EFESO."

Eckhard Gatawis, Head of Division Global Production, HOERBIGER Kompressortechnik Holding GmbH, Vienna


"As a pilot for other areas of the company, this project was of particular importance. Accordingly, the open, smooth cooperation with all parties involved was important. 
ROI-EFESO was convincing in this respect, as well as in its high technical level. The sustainability of the achieved efficiency increase stands and falls with the behavior and value understanding of the executives. Here we succeeded in achieving a real change 'in the heads'."

Jürgen Kaeber, Manager TOS Training Center, Mercedes-Benz Werk Wörth

MTU Aero Engines

"We are very satisfied with the result. The design is already showing that short, efficient assembly time will be absolutely feasible. We ascertained these results not just in theory but very vividly with a 3P (Production Preparation Process) workshop. The design’s good momentum will also flow into a follow-up project."

Elmar Stichlmair, Consultant Engineering Assembly Civil Programmes, MTU Aero Engines

Brilliance Automotive

"Good experience with ROI-EFESO in the past convinced me to bring the team back on board this time. It has been possible to sensitise Chinese colleagues for an entirely new appreciation of quality."

Franz Gollmann, Director of Central Quality at Brilliance Automotive

Carcoustics International

"The skilled, active support provided by the ROI-EFESO team made the location search decidedly shorter and more secure."

Thomas Mair, Business Unit Head, Carcoustics International

HASCO Hasenclever GmbH & Co KG

"With the successful conclusion of this project, not only did we set the course for profitable growth in a very challenging market environment, but we also showed that competitive production is possible in the long term in Western Europe as well."

Dirk Schulte, Senior Vice President, HASCO Hasenclever GmbH + Co KG


"During the project, the plant was running at close to maximum capacity, meaning that everyone involved was under great stress. Nevertheless, through close collaboration and tight project management, we were able to achieve the ambitious objectives."

Joachim Metzmacher,  Business Unit Head Heavy Equipment Production, ENGEL AUSTRIA GmbH

HOERBIGER Ventilwerke Wien

"In the project, ROI-EFESO showed its expertise in impressive fashion in the customer order-based production of small lot sizes. The project managers understood very well how to take up and include ideas from the team without at the same time losing sight of the sought-after overall solution."

Dr. Josef Auernig, Director Plant Vienna, HOERBIGER Ventilwerke

Remmers AG

"ROI-EFESO has become a true partner for us, one who always supports us in a skilled, very customer-oriented manner when it comes to tricky issues involving logistics."

Klaus Boog, Managing Director of Finances, Processes, and IT, Remmers AG

SONA BLW Präzisionsschmiede GmbH

"At the recommendation of a long-time customer, we decided to go with ROI-EFESO and we weren’t disappointed: The highly practice-oriented approach left a lasting impression on our entire project. In the process, the speed at which the measures were implemented was very effective, with the sustained result that existing processes, which were formerly considered to be 'normal', are now viewed more critically by employees and are optimised by them directly."

Mehmet Kamis, System Developement / Kaizen / TPM Coordinator, SONA BLW Präzisionsschmiede GmbH


"For me personally, our discussions were not only the highlight of a typical day-to-day routine, but they also helped me to structure 20 years of my managerial experience and to consolidate it into an orientation course for the Optibelt project management team. This training went far beyond the mere introduction of our manual and it gave the participants a fundamental insight into innovation management and efficiency. We have by all accounts presented this fairly monotonous stuff in a lively manner and with such vitality that we were immediately staring at a second round of advance registrations for the course.

Moreover, we have also set a beacon to which other Optibelt departments such as Quality Assurance, Production, Application Development and, in fact, even foreign subsidiaries, orient themselves. In this manner, our dream of putting a uniform project management into place at Optibelt is becoming a reality, even without any centralised specifications." 

Dr. Frank Michel, Head of Product Development, OPTIBELT GmbH


"ROI-EFESO's consultants have been supporting the development of Olympus OSTE R&D's processes and organization for several years.

Among other things, the projects involved establishing lean development, introducing engineering floor management, and developing design-to-X and leadership skills. We appreciate the highly competent, challenging and at the same time mediating manner. Consistently, we enjoy the close collaboration on-site and remotely!"

Dr. Mathias Kraas, Director Research & Development, OLYMPUS SURGICAL TECHNOLOGIES EUROPE


"Together with ROI-EFESO, we examined our intralogistics concepts and defined potentials for strategic further development. Through the analyses, we were able to reveal important findings for the further course of the project. Relevant technologies and trends were then evaluated for our specific use case and implementation options were developed. The ROI-EFESO consultants distinguished themselves through their high methodical competence and goal-oriented work. The cooperation and the result were excellent at all times."

Dr. Achim Hehl, Managing Director, KOB GmbH


"Together with ROI-EFESO, we achieved with the “Frische Brise” project sustainable productivity and efficiency increases in operations by implementing a shop floor management system adapted to our needs. The ROI-EFESO consultants demonstrated hands on attitude, social skills and relevant experience to support us with lean management know-how built up and training. Their additional support to select a suitable management execution system to digitalize our production processes was very appreciated. Currently we are planning the rollout on the shop floor."

Andreas Weth, Head of SCM International, KNEIPP GmbH