Manufacturing Inventory Optimization Case Study: How Groupe Lemoine Achieved +11% Service Level with AI

When you manage 2,000 SKUs across 10 production sites in five countries, every planning decision ripples through the entire Supply Chain. For Groupe Lemoine, the European leader in cotton-based skin care and hygiene products, that complexity was increasingly difficult to manage with legacy tools — relying on spreadsheets, manual reviews, and team expertise. Until they decided to change the game.

This inventory optimization case study explores how Groupe Lemoine moved from reactive, manual planning to AI-driven Supply Chain control with Flowlity — and the measurable results that followed.

Managing 2,000 SKUs with spreadsheets: Groupe Lemoine's starting point

Groupe Lemoine is no small operation. With over €150 million in annual revenue, 900 employees, and a product manufactured every second, the company supplies cotton-based hygiene products to retailers and distributors across Europe and beyond. Their production network spans 10 sites across France, Holland, Spain, Germany, and Estonia — a scale that requires optimizing inventory across multiple echelons and locations to keep operations running smoothly.

But behind this industrial scale, the Supply Chain team was working with a planning process that hadn't kept pace with the company's growth. As Stéphanie Aury, Supply Chain Project Manager at Groupe Lemoine, explains: the decision-making process was entirely manual. Every week, every month, her team had to review data line by line — a time-consuming effort that left little room for reactivity or strategic thinking.

The consequences were tangible: sales forecasts that lacked precision, high inventory levels, frequent stockouts, and a service level below the company's potential. Different production sites were running on different information systems, making it nearly impossible to get a unified view of what was happening across the network. On top of that, teams were spending significant time on Excel-based data reconciliation, rather than on actions that actually move the business forward.

Groupe Lemoine needed more than incremental improvement. They needed a fundamentally different approach to inventory management optimization — one that could unify their multi-site operations and free their teams to focus on what matters.

Why Groupe Lemoine chose Flowlity for inventory optimization

When evaluating solutions, Lemoine had a clear set of requirements. The tool had to connect production sites that weren't on the same ERP, provide a single source of truth for planning decisions, and be user-friendly enough for daily adoption across teams.

Flowlity stood out because it addressed all three. The platform connected Lemoine's existing production systems, with 2,000 SKUs integrated from the start. But unlike traditional planning tools, Flowlity didn't just centralize data — it transformed how that data was used. Instead of reviewing every SKU manually, planners now only focus on items flagged by Flowlity's alert system, effectively automating and streamlining supply orders across the network.

The project followed a phased approach: distribution first, then production. This allowed teams to build confidence in the tool progressively, starting with replenishment flows across distribution networks before extending to the more complex production environment with its capacity constraints.

A key factor in the project's success was the dedicated support model. From day one, Lemoine worked with a single customer success manager at Flowlity — one point of contact for IT, project management, and Supply Chain teams. This streamlined communication, accelerated onboarding, and ensured alignment throughout the rollout.

How AI-driven planning transformed daily operations

Replacing manual reviews with intelligent alerts

The most immediate change was operational. Before Flowlity, planners spent hours every week going through data line by line. Now, the system automatically identifies which SKUs need attention and which are running smoothly. This shift from exhaustive manual review to exception-based management freed up significant time — time that Lemoine's team now invests in running parallel strategic projects.

Unifying a multi-site, multi-country Supply Chain

One of Lemoine's biggest challenges was the fragmentation of their information systems across sites. Flowlity acts as a unifying layer, giving planners visibility across their European network within a single platform. This visibility is critical for making informed decisions about where to allocate inventory, how to balance production loads, and how to respond to shifts in demand across markets.

The tool also serves as an internal communication support, replacing scattered Excel files with a shared, real-time view of the Supply Chain. Teams across sites now work from the same data, which has streamlined and standardized production processes across the network.

Running simulations in seconds, not days

One of the capabilities that made the biggest difference for Lemoine is Flowlity's simulation engine. Before, evaluating the impact of a change in demand or a shift in production capacity was a slow, manual exercise. Now, simulations run in seconds, allowing planners to test scenarios and make decisions almost instantly.

This capability proved especially valuable for navigating Supply Chain disruptions and capacity constraints — situations where speed of decision directly impacts service levels and costs. For companies facing similar challenges, exploring strategies for forecasting and optimizing inventories in volatile markets can provide additional insights into how simulation-driven planning strengthens resilience.

Smarter demand analysis with AI

Beyond planning automation, Flowlity's AI layer gave Lemoine a deeper understanding of customer behavior patterns. The system analyzes demand signals to produce higher-quality forecasts, which in turn feed into more stable production requirements and better inventory positioning. The result: better organization, better anticipation, and more confident decision-making across the business.

Results: a proven ROI that keeps improving

The impact of this inventory optimization project has been both measurable and sustained:

+11% service level improvement

Lemoine improved their service level by 5 points across the full scope of operations, with peaks of +11 points on specific product segments such as cotton pads.

>98% product availability

A significant reduction in stockouts, directly tied to better demand forecasting and optimized inventory positioning across sites.

Healthier working capital‍

By right-sizing inventory levels, Lemoine freed up cash by aligning inventory levels more closely with actual demand.

Beyond the KPIs, the transformation reshaped how the Supply Chain team works. Decision-making processes are faster and more data-driven. Production workflows are streamlined and standardized across all sites. And perhaps most importantly, planners now spend their time on strategic work rather than manual data crunching.

As Julien Druel, Head of Planning at Groupe Lemoine, puts it:‍

"Thanks to Flowlity, we improved our service level by 5 points full scope, our inventory is now optimized, and on a daily basis we've seen real gains in time, simplicity, and responsiveness."

Watch: Groupe Lemoine's Supply Chain transformation

Hear directly from Stéphanie Aury, Supply Chain Project Manager at Groupe Lemoine, as she shares how Flowlity helped unify their multi-site operations and deliver measurable results.

Key takeaways from this inventory optimization case study

Groupe Lemoine's experience highlights several lessons that are relevant for any manufacturer looking to optimize inventory management across complex, multi-site operations.

The right tool must unify, not just optimize

Lemoine's core challenge wasn't just high inventory — it was fragmented visibility across sites and systems. A solution that only optimized stock levels without connecting the dots across locations wouldn't have solved the underlying problem.

Automation should target the right tasks

The shift from reviewing every SKU to focusing only on alerts was transformational. It didn't just save time — it changed the nature of the planner's role from data processing to strategic decision-making. Plum Living's transformation tells a similar story of how AI reshaped daily planning in a different industry context.

Implementation matters as much as technology

The phased rollout (distribution first, then production) and the dedicated customer success model were instrumental in driving adoption and delivering results quickly.

For industrial companies managing complex Supply Chains, Lemoine's story is a clear proof point: AI-powered inventory optimization isn't just a promise — it's a measurable, operational reality. Explore more Supply Chain case studies to see how other companies achieved similar transformations.

Ready to see what Flowlity can do for your Supply Chain? Download the full Groupe Lemoine case study, or request a demo to explore how AI-driven planning can transform your operations.