The IT/OT Handbook: The Practitioner's Guide to IT and OT Cooperation in Manufacturing: From Silos to Sustainable Digitalization

The practical guide to bridging manufacturing's most expensive divide: operations vs. information technology, where metal meets code.

Your company just spent $2 million on digital transformation. Six months later, IT still can't get production data, OT won't allow cloud connections, and the only thing transformed is everyone's patience.

While every conference preaches convergence and every vendor promises seamless integration, Information Technology and Operational Technology remain locked in a cold war that costs industries billions. And somewhere between these two worlds, digital transformation dies a slow, expensive death.

The IT/OT Handbook is a practical guide written by practitioners who've actually bridged this divide—through midnight plant crises, million-dollar-per-day downtimes, and systems built where metal meets code.

In this book, you'll discover why IT/OT convergence really fails (hint: it's not the technology), seven patterns of collaboration that show where you are and how to evolve, and battle-tested frameworks drawn from Lean, Agile, DevOps, and Team Topologies—adapted for operational realities.

Stop treating IT/OT integration like a technical problem. Start treating it like the organizational evolution it really is.

David Ariens entered the world of large chemical plants in 2010 as a freshly graduated mathematical engineer, stepping into a newly invented position: data scientist at BASF, the multinational chemical giant. He arrived at a pivotal moment—that same year, the industrial world was shaken by Stuxnet, the first computer virus to target an industrial plant. Designed to damage an Iranian uranium enrichment facility previously considered impregnable, Stuxnet sent a shock wave through the industry and marked the tipping point when IT made its way into the heart of manufacturing companies.

Building the bridge between the corporate IT world and the operational OT world became Ariens's profession. He traveled the globe, guiding companies through this complex and fascinating change. In 2012 he introduced BASF's global Industrial Cyber Security program and was put in charge of overseeing the EMEA region. By 2018 he had become responsible for the industrial digitalization teams at one of the world's largest chemical production sites—the BASF facility in Antwerp—while also taking functional leadership of the EMEA Industry 4.0 team.

Today Ariens is the managing director of Analytics For Industry, a company focused on accelerating IT/OT convergence. He serves as an advisory board member for the software startup Timeseer.AI and teaches courses on industrial digital transformation. He is committed to becoming the go-to resource for leaders navigating this paradigm shift.

Willem van Lammeren trained as a chemical engineer, but his passion for IT made digitalization in manufacturing the logical place to build his career. In 2006 he joined Barry Callebaut as part of a small team launching a new frozen pastry production facility in southern Spain. He then moved to AB InBev, the renowned Belgian brewery, where he coordinated and facilitated the implementation of a management excellence program across Western Europe before joining BASF.

At BASF, van Lammeren was one of the few people in IT who had actually worked in production, which positioned him to explore the emerging domain between IT and operations. He experimented with new approaches in fast, iterative fashion while also experiencing classical IT with detailed requirements and rigorous processes. He eventually moved closer to production, collaborating with David Ariens at the Antwerp site. After several years automating supply chain and lab solutions, he stepped into middle management, where many of their shared ideas took shape.

Today van Lammeren serves as tech lead for Industrial IT at Syensqo, where he leads the project to build the company's operational data lake. The idea for this book originated on an afternoon in his garden, when he called Ariens and suggested they stop talking about these ideas over coffee and start writing them down