Kanban

Kanban enables consumption-driven pull control of material and information flows, with the aim of sustainably reducing warehouse stock levels and maximising operational reliability throughout the entire logistics value chain. Discover all the details about the methodology behind this approach now.

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The methodology behind Kanban at a glance

The Kanban methodology manages material flows in a decentralised manner according to the pull principle via closed-loop control systems, precisely at the point of value creation. In this process, a physical or digital trigger via standardised Kanban cards triggers automated replenishment when stock falls below the defined reorder point, thereby eliminating overproduction and administrative downtime. As a Fraunhofer spin-off, ebp-consulting combines the mathematically precise dimensioning of these cycles via advanced data analytics with a pragmatic, hands-on implementation directly on your shop floor. This methodologically sound system achieves a significant reduction in working capital for your warehouse Kanban system, whilst simultaneously ensuring maximum delivery capacity and stabilised operational reliability.

In modern supply chains, this decentralised pull control system acts as a strategic lever for resolving the conflict of objectives between high delivery capacity and minimal capital commitment. This technical article examines the evolutionary development of the system and highlights the mathematical and procedural framework conditions required for error-free operation. We deconstruct the physical and digital aspects of the control method and analyse its integration into higher-level ERP architectures. Furthermore, you will gain practical insights into typical implementation errors as well as proven solution approaches drawn from our many years of industrial consulting experience. The aim of this article is to provide managers with a solid foundation for the upcoming transformation of their intralogistics processes.

At ebp-consulting, we do not view consumption-based control as an isolated tool, but as an integral part of a sustainable end-to-end supply chain. Our methodological excellence is based on the precise mathematical modelling of control loops using data-driven analytical tools in KNIME and Tableau. We combine this scientifically sound approach with a strong focus on implementing measures and provide your team with direct, hands-on support. Through predefined quality gates and structured project management, we ensure error-free integration into your existing system landscape.

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The system is based on a consumption-oriented control principle, whereby materials are only replenished when an actual requirement is reported by the downstream production or storage stage. The fundamental significance of Kanban lies in the consistent reversal of the traditional push principle towards a self-regulating control loop. Physical or digital Kanban cards serve as standardised information carriers, conveying important data such as part number, quantity and source, and autonomously triggering the replenishment process. As soon as a defined minimum stock level is fallen below, the signal is sent back to the source to reproduce or provide the exact quantity consumed. This visual control systematically prevents overproduction, leading to maximum transparency and minimum stock levels.

In focus: What are Kanban cards?

In a decentralised Kanban system, Kanban cards function as standardised physical or digital information carriers that convey essential material and control data such as part numbers, container capacities, and precise source and sink locations. As soon as a load carrier is opened at the workstation, the physical or electronic forwarding of this signal carrier autonomously triggers the replenishment process, which systematically prevents overproduction and ensures a seamless supply of materials on the shop floor.

Overview of Kanban types

Production Kanban

Production Kanban regulates card-based replenishment directly on the production line by signalling the exact consumption of the assembly line to the upstream production stage, thereby systematically preventing costly overproduction.

Transport Kanban

As a classic Kanban system in the warehouse, transport Kanban controls the physical transport of materials between the logistics centre and the consumption points on the shop floor, in order to minimise search and preparation times in intralogistics.

Supplier Kanban

Supplier Kanban extends the Kanban system beyond the factory gates, whereby external component suppliers receive automated delivery triggers when a container is opened and deliver directly to the loading bay on a just-in-time basis.

E-Kanban

Digital E-Kanban utilises sensor technology such as RFID or barcode scans within modern ERP architectures to automatically record material status and completely eliminate administrative lead times in paperless C-parts supply.

The successful establishment of a consumption-oriented control loop requires the flawless interaction of several basic structural elements. A stable system consists primarily of standardised load carriers, clear signalling pathways and disciplined rules of conduct for all parties involved. Only the precise coordination of these factors prevents stock shortages and ensures a continuous supply of materials during ongoing operations. The key aspects are deconstructed in detail below to provide you with a clear picture of the practical configuration. These elements form the fundamental framework upon which any sustainable optimisation of intralogistics value streams is built.

Control loop and container management

The physical basis is formed by the definition of closed control loops, in which a precisely calculated number of standardised containers moves between the source and the sink. A targeted Kanban system in the warehouse often uses two-container systems, in which the opening of the second container automatically triggers the signal to replenish the first. This operational groundwork ensures a continuous supply without the need for manual planning and eliminates human errors in day-to-day operations. In the industrial practice of mechanical engineering, this methodological rigour protects the shop floor from unplanned material shortages amidst a high variety of product variants. The number of containers in circulation directly determines the maximum throughput and must be cyclically adjusted to fluctuations in demand.

Signal transmission and information carriers

The smooth functioning of the system stands or falls on the error-free and delay-free transmission of the demand signal. Whilst traditional physical cards are attached to the containers, digital e-Kanban via RFID or barcode scans is becoming increasingly established in the wake of Industry 4.0. This technological modernisation reports consumption in real time to the higher-level ERP system, thereby completely eliminating administrative delays. For IT managers, a clean interface architecture with the warehouse management system is crucial to avoid data silos and maintain system stability. ebp Consulting ensures that the digital code is precisely synchronised with the physical processes on the shop floor.

Capacity coordination and demand smoothing

A self-regulating control loop can only achieve its full efficiency if the upstream production stage is able to respond flexibly to demand. This requires methodical consumption smoothing in the spirit of Lean Management, in order to systematically cushion extreme demand peaks and capacity bottlenecks. In close conjunction with Sales & Operations Planning (S&OP), capacities must be synchronised in such a way that the source consistently meets the required replenishment lead times. Our industrial experience shows that without this strategic smoothing, the risk of rush orders and temporary overloading on the shop floor increases dramatically. The ebp experts therefore always calibrate the system whilst taking a holistic view of your production flexibility and batch sizes.