Lean manufacturing is an essential methodology for achieving optimal production processes. Its principles guide efforts to ensure product quality, conserve resources and carry out timely maintenance of the machinery and equipment involved in the production chain. This methodology also includes tools that facilitate the work, control and monitoring of operations.
In this article, we’ll tell you about 5 tools for lean manufacturing that you need to know.
Definition of lean manufacturing
To begin with, lean manufacturing is a a methodology widely used in the industrial sector. But what does it involve? Broadly speaking, the aim is to maximise the value of products by optimising production processes, with a view to minimising loss or waste generation as much as possible.
Originating from the Toyota production system, this methodology focuses on to improve the flow of materials and minimise the costs associated with excess stock, lead times and resulting product defects.
All in all, the lean manufacturing search for the continuous improvement of production systems in order, on the one hand, to contribute to the well-being of workers and specialists and, on the other hand, to create value using the fewest possible resources. This is why it is a methodology that requires a comprehensive approach focused not only on adapting to new technologies, but also on innovation.
Key principles of lean manufacturing
The methodology lean manufacturing has principles which are key to improving both business strategy and production efficiency. What are they? These key factors are set out below:
- The effectiveness is one of the key factors, given that the satisfaction Customer satisfaction is one of the company’s main concerns. In fact, meeting customers’ expectations is a sign that this methodology is being applied correctly.
- The efficiency It is linked to the optimisation of material use. As we have seen, the aim is to create value through the systematic elimination of waste.
- The innovation It goes beyond the implementation of technological solutions; it is also about the leadership that enables opportunities for improvement to be identified. At this stage, efforts are focused on devising innovative alternatives to overcome difficulties or improve processes.
However, to fully understand this, it is necessary to realise that lean manufacturing also has certain guidelines, namely:
- Just-in-time production (just in time) and on the first attempt.
- Eliminate processes or activities that do not add value.
- To continuously improve product quality.
- Produce on demand to optimise stock levels.
- To improve relations with suppliers.
- To provide solutions for customers or consumers.
5 lean manufacturing tools
In the methodology lean manufacturing, there are various tools that help to optimise processes and eliminate waste. Some of the most important lean manufacturing tools are described below.
Total Productive Maintenance (TPM)
This is a tool designed to maximise the efficiency of a company’s physical assets, such as machinery and other equipment used in production. This is a preventative approach that draws on at least eight essential aspects to ensure the equipment operates optimally, namely:
- Identifying areas for improvement.
- Self-managed maintenance of machinery (supervision of operators).
- Planned maintenance (scheduled inspections).
- Quality maintenance (identifying manufacturing defects).
- Management of the above points.
- Training and preparation of operators.
- Sustainability and occupational health and safety.
Continuous flow or one-piece flow
The production of one item at a time using a systematic, uninterrupted process is known as continuous flow or, in English, one-piece flow. In lean manufacturing, this tool is essential for reducing waiting times and managing excess stock, as well as stock. In addition to this, the continuous flow increases efficiency, reduces downtime, the waiting and, above all, the waste resulting from such circumstances.
Task automation
In lean manufacturing Nor can we overlook what is now a mandatory practice across all industries: automation. This refers to the incorporation of technologies, digital solutions and automated systems to carry out repetitive, precise and complex tasks with greater precision than human labour. In this respect, automation involves reducing errors, speeding up processes, improving control and collecting data on operations. This fulfils the principle of just in time.
Poka-Yoke
Poka-Yoke is a method developed by Toyota to to avoid or minimise mistakes in the production line and even in storage. How is it applied? It begins with analysing and understanding the task; once this has been completed, a strategy or procedure is devised to optimise the process, as the aim is to avoid defects or errors. At all times, the objective is to ensure product quality.
Value Stream Mapping (VSM)
The value stream map, or, in English, value stream mapping It is a tool designed to monitor and analyse material flows throughout the production process; furthermore, Information is gathered to enable the identification and elimination of activities that detract from value in manufacturing. With the flow chart in place, companies can identify bottlenecks, downtime, waiting times and other issues. As a result, available resources and time are optimised.
Advantages and disadvantages of using these tools
These are the advantages and disadvantages of applying the five lean manufacturing tools mentioned above.
Advantages
The use of lean manufacturing tools offers numerous advantages. These include those we have already highlighted: reduction in defects, improved efficiency and optimisation of associated costs to the production process. Indeed, these tools enable companies to adapt quickly to changes in demand and reduce excess stock, which results in lower operating costs.
Disadvantages
However, the implementation of these tools also has certain drawbacks. It requires a a significant initial investment in training and in adapting existing processes. Furthermore, it can be difficult to integrate these tools into traditional production systems, which may lead to resistance to change. Despite these challenges, the long-term benefits of adopting lean manufacturing generally outweigh the initial difficulties.
