Process optimisation lies at the heart of the success of modern companies. In their quest for efficiency and performance, business leaders are increasingly turning to proven methods such as Lean management and the lean manufacturing. These concepts, which originated in the Japanese automotive industry, have now established themselves across many sectors. But, like any methodological approach, Lean can only bear fruit if certain fundamental rules are respected.
The promise of Lean Management
Before diving into the rules of Lean management, it is essential to understand what this term implies. Lean, often translated as “management without waste”, aims to reduce all forms of waste in production processes. This includes minimising unnecessary inventories, reducing waiting times and eliminating low value-added tasks. In other words, lean management seeks to optimise the entire value chain in order to deliver quality products or services, at the lowest cost and within shorter lead times.
One of the first mistakes some companies make when adopting Lean is to think of it as merely a series of techniques. In reality, it is a fully-fledged management philosophy. Lean rests on principles deeply rooted in the culture of continuous improvement (Kaizen), team involvement and customer focus.
The first rule: Understand the value chain
The first rule of lean manufacturing is simple but crucial: you must know your value chain inside out. Why is this so important? Because before even thinking about reducing waste, you have to identify where it lies. And this analysis can only be carried out with a clear and detailed understanding of the processes in place.
Imagine a company seeking to improve its production time. If it does not take the time to map its value chain, it risks intervening at points that are not the real bottlenecks. Indeed, a process may seem inefficient at first glance, but the underlying causes may well lie elsewhere. This is why the first step of Lean always consists of analysing and mapping the value chain.
Mapping the value chain: VSM
A key Lean management method for this stage is Value Stream Mapping (VSM). This tool makes it possible to visualise all the steps a product or service goes through, from raw material to the end customer. It identifies the flows of materials and information required to complete each step.
Value stream mapping helps to spot waste, which can be classified into several categories: overproduction, waiting times, defects, unnecessary transport, excess inventory, unnecessary movements and overprocessing. This waste represents hidden costs that weigh on the company’s performance, but it can only be eliminated once it has been identified.
Process optimisation in Lean Manufacturing
Once the value chain is well understood and mapped, it becomes possible to move on to the next stage: process optimisation. This is where lean manufacturing comes into its own. The objective is to rethink production processes to make them smoother, faster and more efficient.
Take the example of an industrial company that assembles components to produce machines. In analysing its value chain, it finds that certain components are produced in excess to compensate for potential defects. This generates additional costs in terms of storage and inventory management. By adjusting the production process to reduce defects upstream, this company could considerably reduce its inventories and gain agility.
The Lean management also encourages greater flexibility in production processes. It is not just about producing faster, but also about adapting quickly to changing customer demands. This is where the concept of “pull flow” comes in: production is triggered by actual market demand, rather than by sometimes inaccurate forecasts.
The importance of team commitment
No optimisation project can succeed without the active involvement of those at the heart of daily operations: the teams. Lean should not be perceived as a set of top-down directives, but as a collaborative process. Operators, technicians and managers are best placed to identify the sticking points in their daily work and to propose improvements.
Encouraging a culture of continuous improvement is therefore a key component of Lean management. It is about establishing a dynamic in which every employee, at every level, feels responsible for the company’s performance and is encouraged to propose solutions to optimise processes.
Conclusion
The lean manufacturing and the Lean management are powerful approaches for any company seeking to improve its operational performance. However, the success of their implementation depends on mastering fundamental principles, starting with a thorough understanding of the value chain. Without this initial step, any attempt at process optimisation is likely to be in vain. By correctly applying this first rule, companies can not only reduce their waste but also strengthen their competitiveness over the long term.
Xavier Schuster
Consultant at SXE Consulting. Industrial consulting firm based in Luxembourg, 25 years of experience in operational excellence.
View profile →