1. basics and principles

1.1 Lean construction

The term Lean Construction refers to an approach that aims to reduce waste and increase efficiency in the construction industry. Lean construction is based on the principles of the Toyota Production System (TPS) and is an adaptation of lean principles to the specific requirements and challenges of the construction industry.

1.2 Minimize waste

The minimization of Waste is one of the main objectives of lean construction. It involves identifying all activities that do not add value to the construction project and reducing or eliminating them as far as possible.

1.3 Value stream mapping

The Value stream mapping is a method for identifying and visualizing the various process steps and resource flows within a construction project. By analyzing the value stream, waste and inefficiencies can be uncovered and appropriate improvement measures can be introduced.

1.4 Pull principle

The Pull principle is a fundamental principle of lean construction, in which the demand for resources and materials determines the flow of work rather than being dictated by a fixed plan.

2. methods and techniques

2.1 Kaizen

Kaizen is a Japanese term that means „continuous improvement“. In the context of lean construction, kaizen refers to the continuous optimization of processes, procedures and working methods in order to reduce waste and increase efficiency.

2.2 Kanban

Kanban is a method for controlling work processes that was developed in the Toyota Production System (TPS). In the construction industry, Kanban can help to improve communication and coordination between the various players and increase the transparency of work processes.

2.3 5S method

The 5S method is a system for organizing workplaces based on five Japanese terms: Seiri (sorting), Seiton (setting in order), Seiso (cleaning), Seiketsu (standardizing) and Shitsuke (self-discipline). Applying the 5S method on construction sites can help to increase safety and efficiency.

2.4 Last Planner System

The Last Planner System is a method for planning and managing construction projects that is based on collaboration between the parties involved in the project. By jointly creating and adapting detailed work plans, bottlenecks can be avoided and project execution optimized.

2.5 Cycle planning

The Takt Planning is a method for coordinating the timing of work processes in construction projects. The various work steps are divided into equal time segments (cycles) to ensure a continuous and efficient work flow.

3. practices and application

3.1 One-piece application

One-piece application iis a concept from lean construction in which work on a single construction element or work order is completed without interruption before the next one is tackled. This avoids bottlenecks and increases the efficiency of work processes.

3.2 Modular design

The Modular design refers to the use of prefabricated components or modules that are manufactured in the factory and then assembled on the construction site. This approach enables greater precision and efficiency as well as a reduction in construction time.

3.3 Building Information Modeling (BIM)

Building Information Modeling (BIM) is a digital method for planning, executing and managing construction projects. BIM enables better collaboration between the various project participants and more efficient use of resources through the central storage and management of project information.

3.4 Lean design

Lean Design is an approach that aims to make the planning phase of a construction project as efficient and economical as possible. This can be achieved through the use of lean principles such as value stream mapping, the pull principle and standardization.

3.5 Lean supply chain management

Lean supply chain management refers to the optimization of the supply chain in the construction industry through the application of lean principles. The aim is to make the procurement and provision of materials as efficient as possible in order to reduce waste and lower project costs.

3.6 Lean facility management

Lean facility management is the application of lean principles to building management in order to improve the efficiency and sustainability of buildings. This can be achieved by optimizing operational processes, maintenance and energy consumption.

3.7 Integrated project management IPD

Integrated project management (IPD) is a collaborative approach to the management of construction projects based on close cooperation between all project participants. By jointly planning, executing and monitoring the project, risks can be minimized and efficiency increased.

3.8 Lean Commissioning

Lean Commissioning is the process of reviewing and accepting construction projects using lean principles. The aim is to ensure that the client's requirements are met and that the construction quality meets expectations. Lean commissioning involves the early involvement of commissioning teams, close collaboration between project participants and the use of standardized procedures to avoid errors.

3.9 Lean Retrofit

Lean Retrofit is the application of lean principles to the refurbishment and modernization of existing buildings. Efficient planning and implementation of refurbishment measures can reduce costs and improve the environmental compatibility of buildings.

3.10 Lean and sustainable construction

Lean and sustainable construction combines the principles of lean construction with the aim of creating environmentally friendly and resource-efficient buildings. This includes the use of environmentally friendly materials, energy-efficient construction methods and the minimization of construction waste.