SMED: The Lean Technique That Can Transform Manufacturing Efficiency

In today's competitive manufacturing environment, companies are constantly searching for ways to increase flexibility, reduce costs, and respond more quickly to customer demand. One of the most powerful Lean Manufacturing techniques for achieving these goals is SMED, which stands for Single-Minute Exchange of Dies.

Despite its name, SMED is not limited to changing dies in a press machine. It is a systematic methodology for reducing setup or changeover times in any manufacturing process. Whether switching between product models, adjusting machine settings, or preparing production lines, SMED helps organizations minimize downtime and maximize productivity.

What is SMED?

SMED was developed in the 1950s and 1960s by Japanese industrial engineer Shigeo Shingo as part of the Toyota Production System. The primary objective is to reduce setup times to less than ten minutes or at least make them dramatically shorter than before.

Long changeovers force manufacturers to produce large batches in order to justify the downtime. While this may seem efficient, it often results in excessive inventory, longer lead times, and reduced flexibility. SMED addresses this challenge by making changeovers so quick that smaller production batches become economically viable.

The SMED methodology follows three main steps:

1. Separate Internal and External Activities

Internal activities can only be performed while the machine is stopped, whereas external activities can be completed while the machine is still running. The first step is to identify each activity and determine whether it truly requires production to stop.

2. Convert Internal Activities into External Ones

Many tasks traditionally performed during downtime can actually be completed beforehand. Preparing tools, preheating equipment, organizing materials, or verifying settings before shutdown significantly reduces idle time.

3. Streamline Remaining Internal Activities

For the tasks that must occur during the changeover, the goal is to simplify and standardize every step. Quick-release fasteners, standardized tooling, parallel operations, and visual work instructions all contribute to faster and more consistent setups.

Reducing setup times delivers benefits that extend far beyond the production floor. Faster changeovers enable manufacturers to produce smaller batches without sacrificing efficiency, leading to lower inventory levels and improved responsiveness to customer demand.

Let´s see a simple example to illustrate this technique.

Imagine a packaging line that requires 90 minutes to switch from one product size to another. By analyzing the setup process, the team discovers that many tools are collected only after the machine stops, settings are adjusted manually, and operators perform tasks sequentially.

After applying SMED principles, tools are prepared in advance, machine settings are standardized, and two operators perform different tasks simultaneously. The result? The changeover time drops from 90 minutes to just 15 minutes. The company can now produce smaller batches, reduce inventory, and respond more quickly to changing customer orders.

SMED is more than a technique for speeding up machine setups, it is a mindset focused on eliminating waste and improving operational agility.

In a world where customer expectations continue to evolve and product lifecycles become shorter, the ability to change production quickly is a significant competitive advantage.

Whether you manage a large manufacturing facility or a small production line, implementing SMED can unlock hidden capacity, improve efficiency, and support a more responsive and resilient supply chain. Sometimes, the biggest improvements come not from working harder, but from making every minute count.

Logistionary: Kanban

Kanban is a visual scheduling system for lean manufacturing.

It all started in the early 1940s when the first Kanban system was developed by Taiichi Ohno for Toyota automotive in Japan. It was created as a simple planning system, the aim of which was to control and manage work and inventory at every stage of production optimally.

The Kanban method gets its name from the use of kanban, visual signalling mechanisms to control work in progress for intangible work products.

Kanban aligns inventory levels with actual consumption. A signal tells a supplier to produce and deliver a new shipment when a material is consumed. This signal is tracked through the replenishment cycle, bringing visibility to the supplier, consumer, and buyer.

In contexts where supply time is lengthy and demand is difficult to forecast, often the best one can do is to respond quickly to observed demand. This situation is exactly what a kanban system accomplishes, in that it is used as a demand signal that immediately travels through the supply chain.

Kanban cards are a key component of kanban, and they signal the need to move materials within a production facility or to move materials from an outside supplier into the production facility. The kanban card is, in effect, a message that signals a depletion of product, parts, or inventory. When received, the kanban triggers replenishment of that product, part, or inventory.

Three-bin system

An example of a simple kanban system implementation is a "three-bin system" for the supplied parts, where there is no in-house manufacturing. One bin is on the factory floor (the initial demand point), one bin is in the factory store (the inventory control point), and one bin is at the supplier. The bins usually have a removable card containing the product details and other relevant information, the classic kanban card.

When the bin on the factory floor is empty (because the parts in it were used up in a manufacturing process), the empty bin and its kanban card are returned to the factory store (the inventory control point). The factory store replaces the empty bin on the factory floor with the full bin from the factory store, which also contains a kanban card. The factory store sends the empty bin with its kanban card to the supplier. The supplier's full product bin, with its kanban card, is delivered to the factory store; the supplier keeps the empty bin. This is the final step in the process. Thus, the process never runs out of product, and could be described as a closed loop, in that it provides the exact amount required, with only one spare bin so there is never oversupply.

If all this is confusing, and you´re still not clear on how Kanban works, Im sure the next image will make everything fall into place! One image is indeed worth a thousand words as they say!

Logistionary: Kano model

  

The Kano model is a theory for product development and customer satisfaction developed in the 1980s by Noriaki Kano, a professor of quality management at the Tokyo University of Science.

It´s an approach to prioritizing features on a product roadmap based on the degree to which they are likely to satisfy customers. Product teams can weigh a high-satisfaction feature against its costs to implement to determine whether or not adding it to the roadmap is a strategically sound decision.

The model involves two dimensions:

1. Achievement (the horizontal axis), which goes from the supplier didn’t do it at all to the supplier did it very well.

2. Satisfaction (the vertical axis), which goes from total dissatisfaction with the product or service to total satisfaction with the product or service.

It also identifies three levels of customer expectations: that is, what it takes to positively impact customer satisfaction

1. Expected needs: These are the must haves, the requirements that the customers expect and are taken for granted.

These expectations are also known as the dissatisfiers because by themselves they cannot fully satisfy a customer. However, failure to provide these basic expectations will cause dissatisfaction.

Examples: In a hotel, providing a clean room is a basic necessity. In a call center, greeting customers is a basic necessity.

2. Normal needs: These are known as the wants or the satisfiers because they are the ones that customers will specify from a list. They can either satisfy or dissatisfy the customer depending on their presence or absence.

Examples: Time taken to resolve a customer's issue in a call center. Waiting service at a hotel.

3. Exciting needs: These are features and properties that make a supplier a leader in the market. These are the delighters or exciters because they go well beyond anything the customer might imagine and ask for. Their absence does not dissatisfy the customer, but their presence improves the likelihood of purchase.

Examples: In a callcenter, providing special offers and compensations to customers or the proactive escalation and instant resolution of their issue is an attractive feature. In a hotel, providing free food is an attractive feature.

How Does the Kano Model Work?

Using the Kano Model, product teams pull together a list of potential new features vying for development resources and space on the roadmap. The team will then weigh these features according to the two competing criteria:

1. Their potential to satisfy customers.

2. The investment is needed to implement them.

Hoshin Kanri: translating strategic plans into actionable items

Many companies struggle with translating strategic plans into actionable items on a daily process, luckily, among the most powerful tools in the Lean arsenal for effective strategic management we can find Hoshin Kanri.

Similar Jidoka or Just in Time, Hoshin Kanri has its roots in the Toyota Production System and as a tool, it can be very helpful, when implemented properly, in bridging the gap between strategy and execution.

Hoshin Kanri has a Matrix shape with four quadrants each devoted to a specific task.

1-     Set the strategic vision & goals (3-5 year breakthrough objectives):

 

The long-term goals is the starting point In Hoshin Kanri, normally in the frame between 3 and 5 years.

 

List them at the bottom quadrant of the matrix template and have in mind that every initiative will have many smaller tasks that will need to process before achieving the goal.

 

2-     Define key mid-term objectives (annual objectives)

After your long-term goals are all set, prepare the most important objectives that you aim to achieve in a shorter time frame and put them in the left quadrant of the Hoshin matrix.

 

3-     Set short-term actions and metrics (improvement priorities)

 

You will need to fill the top quadrant with the most important activities that need to be completed to achieve the short-term goals, this is basically the to-do list for the upcoming months.

 

4-     Agree on key performance indicators (targets to improve)

Agree on the most crucial metrics that need to be improved and list them on the diagram.

 

Following this line of thought, right next to the key metrics, you need to list the key stakeholders responsible for leading the completion of the activities in the matrix's top quadrant.

 

Finally, you should complete the picture by specifying the dependencies between every listing in your matrix.

Logistionary: Kaizen

Kaizen is a Japanese word that means “change ofr better” but it´s also a philosophy that refere to continuously improve; instead of encouraging large, radical changes to achieve desired goals, Kaizen philosophy recommends that organizations introduce small improvements, preferably ones that could be implemented on the same day.

In Supply Chain Kaizen is an on going process and its purpose goes beyond simple productivity improvement. It is also a process that, when done correctly, humanizes the workplace and teaches people how to eliminate waste.

While Kaizen usually delivers small improvements, the culture of continual small improvements and standardization yields large results in terms of overall improvement in productivity.

The following video, although in Spanish compliments the abobe information in an easier and approachable way!

5S

In today´s post I would like to explore the so called 5S in logistics. 

The 5S is one of the most popular methodologies organizations adopted in present times to optimize productivity at the same time the company maintains their quality and safety standards.

But, what is exactly the 5S? It can be seen as an organization method which helps companies organize their workspace in order to achieve greater efficiency. This term uses 5 Japanese words: seiri, seiton, seiso, seiketsu and shitsuke. Translated into English these words stand for sorting, straightening, shining, standardizing and sustaining.

The 5S concept originated in Japan conceived by Hiroyuki Hirano. Mr Hirano recommended a structured 5 steps approach to help western managers to successfully manage their available resources and cumply with safety and quality standards.

Breaking down the 5S we have:

-         Sorting: By eliminating all unnecessary parts, tools and every item that is no longer in use and are just lying around. The objective is to make the workplace tidier and more organized.

 

-      Straightening Out: Refers to the systematic storage of objects, in such a way that everybody can have access to them when needed.

-          Shining: Refers to keep the workplace and all equipments clean, eliminating all causes of disruption or failure.

-         Standardizing: It´s a key component that ensures processes followed by an organization are consistent. Therefore, all employees performing the same duties should not find any difficulty while working from any of the workstations or locations. Each employee must clearly know what exactly the role is and how the responsibilities should be discharged.

-      Sustaining: This is probably the most difficult step, and it refers to the process of maintaining and reviewing standards on a regular basis, ensuring that everything keeps on being implemented effectively. 

The 5S program was extended with the addition of 3 more “S”: Safety, Security and Satisfaction in order to maintain a holistic approach to the whole business taking into account safety issues occurring into the organization.

The 5S program provides long-term benefits to all kinds of organizations, improves productivity and boost efficiency at the same time it reduces casualties and accidents.

No wonder why some of the most important companies have established this program to optimize their business.