Assessing lean maturity is not a process reserved exclusively for lean management experts or large industrialised corporations.

It is the best way to optimise processes, reduce waste, and increase the value delivered to customers 👌

But how do you know where you really stand in your lean transformation?

And above all, how do you move to the next step without getting lost in benchmarks disconnected from your reality on the ground?

Because let's be clear: implementing lean rituals is not enough.

Sticky notes, quality audits, or problem-solving meetings are effective only if they are part of a structural approach, supported and shared at all levels of the organisation.

Assessing lean maturity feeds into a concrete roadmap, aligned with your business objectives.

In this article, you will discover how to evaluate your level of lean maturity methodically and how to identify your levers for progress.

Ready to take your lean approach to the next level?

Assessing lean maturity for manufacturers diagnosing their transformation

Is your manufacturing business truly engaged in a lean journey? 😎

Assessing lean maturity means conducting a clear and objective diagnosis of your organisation, your methods, and your management culture.

In an environment where competition and regulatory constraints are increasing, manufacturers no longer have the luxury of moving forward blindly.

The lean maturity assessment allows you to take a precise stock of the situation and build a realistic roadmap towards greater performance, quality, and agility.

Let’s look together at how to lay the foundations for an effective self-assessment, which models to use, which criteria to rely on, and above all, how to translate the results into concrete actions.

Understanding the fundamentals of lean management

Lean management is an organisational approach centred on value creation and waste reduction ♻️

Initially inspired by the Toyota Production System, this approach has since been widely adapted in manufacturing, energy, aerospace, and automotive industries.

Definition of Lean Management

In concrete terms, lean is based on five main principles:

• identifying value from the customer's perspective

• mapping value streams (Value Stream Mapping)

• eliminating waste (mudas)

• creating a continuous flow and pulling production based on demand

• and finally, committing to continuous improvement (kaizen)

The application of lean is not limited to production.

It deeply transforms the culture of the organisation: management, performance steering, communication, human relations.

This is where the main difficulty lies and the reason why it is essential to assess your lean maturity before going any further.

Origins of lean: Toyota, Kaizen, Muda

The roots of lean lie in Japan, in the 1950s, at the very heart of the industrial evolution led by Toyota 🚘

It was Taiichi Ohno, engineer and pioneer of the Toyota Production System (TPS), who formalised its key principles.

His objective: to produce more value with fewer resources, by identifying unnecessary tasks and streamlining processes.

Three fundamental concepts structure the lean approach: Muda (waste), Mura (unevenness), and Muri (overburden).

Kaizen – or continuous improvement – also constitutes a historical pillar of lean.

This principle is based on the idea that every employee, regardless of their position, can contribute to moving the organisation forward, one small step at a time.

Lean is a management philosophy, deeply rooted in operations, but which requires leadership, rigour, and consistency.

Hence the value, for any industrial company, of regularly measuring its lean maturity.

Objectives of lean for a manufacturing company

Why adopt lean management in a manufacturing company? 🙄

Because it addresses concrete challenges: improving product quality, reducing production costs, securing delivery times, and increasing customer satisfaction.

But the ambition goes further.

Lean also helps to mobilise teams, break down organizational silos, simplify decision-making, and establish a culture of continuous improvement.

For a production director or a quality manager, lean offers methods to steer performance at all levels.

It is also an ideal foundation for accelerating a digital transformation, by streamlining processes and preparing the organisation for the integration of digital tools.

But first, you need to know if your organisation is ready for this mindset 🏋🏼‍♀️

This is where the lean maturity assessment comes in: a strategic exercise to align your ambitions with your actual capacity to support change.

What is lean maturity?

Lean maturity refers to the level of integration of lean management principles within an organisation.

It is not just a measure of compliance: it is an operational and cultural reading of your progress.

A company considered mature in lean has successfully translated theoretical principles into concrete practices on the ground.

It acts on behaviours, processes, tools, but also on the management system and decision-making mechanisms.

Conversely, an organisation still in the discovery phase applies lean in a sporadic, isolated way, often without real consistency or sustainability.

Lean maturity cannot be decreed; it is built step by step.

And that is precisely what is made possible by standard models such as the Lean Maturity Model or the Shingo Model.

They offer a common language and a shared grid to position your organisation, objectify progress, and drive the transformation.

Why assess your lean maturity?

Generally, assessing lean maturity is an operational need for all manufacturing companies that want to progress fast and well, without skipping steps.

The challenges of an assessment process

This assessment provides a clear snapshot of your current situation:

Which lean principles are actually being implemented?

What is the involvement of the management?

Do the teams have sufficient autonomy to suggest improvements?

Are processes standardised?

Do you have relevant indicators to steer your improvement projects?

A rigorous analysis of your lean maturity prevents you from launching actions that lack grounding or consistency.

It helps you prioritise your efforts, build targeted action plans, and involve all stakeholders over the long term.

Identifying the right time to assess

When should you assess your lean maturity?  🤨

Before any structural project, it is an essential step.

A prior diagnosis prevents errors in timing or scope.

This can happen at various times: before a lean project, during a change in governance, during an industrial reorganisation, or after the first deployments of lean practices on the ground.

The assessment is also useful periodically, as a tool to monitor your lean progress.

Every 6 to 12 months, it allows you to measure progress, adjust the strategy, and maintain a high level of team engagement.

The most important thing is to adopt a continuous self-assessment approach.

By integrating this process into your routine, you will make lean a sustainable pillar of performance.

Beneficiaries of the assessment: management, production, quality

The lean maturity assessment benefits all key roles in your manufacturing organisation.

For senior management, it provides a strategic compass 🧭

It highlights areas of vulnerability, identifies strengths, and supports alignment between vision and execution.

For production directors, the assessment helps target areas with high improvement potential.

It facilitates the prioritisation of projects, the mobilisation of resources, and the tracking of gains achieved on the ground.

For quality managers, it is a valuable analytical tool for securing processes, developing a problem-solving culture, and strengthening interdepartmental collaboration.

Finally, for operational teams, the assessment is an opportunity to voice their opinions, take a step back, and participate actively in the lean transformation.

It plays a key role in the collective ownership of the improvement process.

How to assess your lean maturity

To apply it to your organisation, assessing lean maturity must be structured. 

It relies on proven lean management methods and lets you form a real, shared, and actionable diagnosis of your organisation.

Assessment methods: audit, self-diagnosis, benchmark

There are several approaches to assessing a lean maturity level 📐

Each has its advantages depending on your level of progress, your internal resources, and your goals.

A lean audit is carried out by an expert third party, often an external agency.

It brings an objective eye, a comparison with industry standards, and constructive criticism of current practices.

Lean self-assessment, increasingly popular thanks to simplified grids and tools, allows your teams to carry out an initial diagnosis independently.

It is a good starting point for initiating an internal dialogue around your practices and your lean management.

Finally, benchmarking allows you to position yourself relative to other companies in the same sector.

By comparing your results to those of similar organisations, you can objectify your maturity gaps and identify concrete areas for improvement.

Available tools: grids, matrices, questionnaires

To conduct a reliable lean assessment, you need the right tools 🛠️

Fortunately, several proven formats are available today to facilitate this process, even if you are not a lean expert.

The lean maturity grid is a matrix that allows you to locate your level of progress based on different pillars (culture, performance, flow, standardised practices, etc.).  

It often works in successive steps (5 levels), ranging from