Lean Manufacturing
Disciplined improvement of flow, quality and operational performance, supported by people, problem solving and reduction of waste.
What Digital Green Lean means
Digital Green Lean integrates Lean Manufacturing, Industry 4.0 and Circular Economy in the same operating system. Culture, leadership and the ongoing management of tensions support their development together. The term was introduced scientifically by Ignacio S. Gatell and Lucía Avella.
The framework is a way to examine connected industrial decisions. It does not assume that one tool, technology or improvement programme can solve every transformation problem.
Three foundations, one operation
Industry 4.0
Digital technologies, data and connectivity that can improve understanding and decisions when they address an operational need.
Circular Economy
Attention to resource stewardship and circular flows, including reducing resource demand and recovering or retaining value in materials and products.
Their order here is explanatory, not an implementation sequence. A material recovery initiative, a data system and a change in standard work can affect the same process and the same people. Integration means considering those relationships and dependencies in context.
Culture and leadership
Culture shapes how people surface problems, share ideas, learn and participate in decisions. Leadership connects business priorities with responsibilities, capabilities and review routines. Both matter when stable operational standards meet Digital recommendations or new resource flows.
- Connect the business question with the people who understand the process.
- Treat data as evidence to interpret, not as a replacement for operational judgement.
- Make responsibilities and review points visible.
- Support learning and participation alongside implementation.
An integrated operational flow
A practical interpretation begins with a defined operating process. Review performance and resource flows together, identify useful Digital support and examine the culture and leadership conditions needed to act. Agree a change, responsibilities and evidence, then review results and adjust.
This is an iterative explanation of the framework, not a fixed or universally validated implementation protocol. The published maturity model focuses specifically on culture and leadership.
Three levels of explanation
Macro · Institutional context
External requirements, stakeholder expectations and pressures help explain why transformation priorities differ across organisations.
Meso · Organisational capabilities
Capabilities to sense opportunities, act and reconfigure resources help explain how the organisation develops its response.
Micro · Tension management
Managerial choices and routines help teams navigate persistent competing demands over time.
These are theoretical levels of the research. They are distinct from the Lean, Digital and Green visual layers used to interpret the brand symbol.
Five channels of innovation
- Kaizen Teian: continuing improvement ideas from employees, with visible evaluation and follow-up.
- Kaizen Events: focused, time-boxed improvement work by a team on a defined process.
- Product innovation: development around a verified customer need and validated standards.
- Open innovation and crowdsourcing: contributions from partners, suppliers, customers, universities and wider communities.
- Digital innovation: data and systems that make improvement visible and testable, interpreted with human judgement.
Scope and limits
The four tensions are not permanently eliminated by adopting the framework. Responses depend on material characteristics, operating constraints, institutional context and organisational capabilities. Neither the framework nor an assessment is a certification.
The original three foundations remain Lean Manufacturing, Industry 4.0 and Circular Economy. Industry 5.0 is discussed as a future human-centric, sustainable and resilient direction, not a fourth foundation.
See the research sources for the full evidence and scope.