Single Minute Exchange of Die process during crew mobilization

SINGLE MINUTE EXCHANGE OF DIE (SMED)

Single Minute Exchange of Die (SMED) is a Lean methodology created by Shigeo Shingo to drastically reduce equipment changeover or setup time. Originally used in manufacturing, SMED separates activities into two types:

  • Internal activities: Tasks done while equipment is stopped

  • External activities: Tasks that can be done while the equipment is still running

By converting internal steps into external ones, teams minimize downtime and keep workflows moving.

It’s all about making the workflow unobstructed.

When Can You Use SMED in Construction?

In the construction industry, Single Minute Exchange of Die (SMED) helps reduce delays and optimize productivity. For instance, quick couplers—used on excavators—allow for fast attachment changes without manual tools, keeping projects on schedule.

Other SMED Applications in Construction:

Lean behaviours in construction last planner system takt planning

Fast-track scaffold assembly and disassembly

Lean behaviours in construction last planner system takt planning

Pre-assemble modular building components off-site

Lean behaviours in construction last planner system takt planning

Rapid tool or crew changeovers for repetitive tasks

construction project solution value stream mapping takt planning

What is the Goal of SMED?

The goal of Single Minute Exchange of Die (SMED) is simple: reduce setup time to keep both equipment and crews moving. While the name implies setups under 10 minutes, the deeper aim is continuous improvement.

Originally, SMED cut press setup times from over an hour to just minutes. In construction, similar improvements lead to faster project delivery, fewer delays, and higher productivity.

Benefits of Using Single minute exchange of die (SMED) in Lean Construction

Implementing SMED brings several powerful benefits to your project:

Lean Touch Solutions kaizen

Reduced Downtime – Faster changeovers mean more equipment uptime and fewer delays.

Lean Touch Solutions kaizen

Improved Efficiency – Removing unnecessary steps creates smoother operations.

Lean Touch Solutions kaizen

Cost Savings – Less idle time and labour waste translate to direct savings

Lean Touch Solutions kaizen

Greater Flexibility – Teams can respond quickly to project changes or issues.

Lean Touch Solutions kaizen

Higher Quality – Standardized processes reduce errors and rework.

Lean Touch Solutions kaizen

Enhanced Workplace Safety – Predictable setups lower the risk of last-minute hazards.

Whether it’s switching buckets on a machine or rotating teams between tasks, Single Minute Exchange of Die (SMED) boosts efficiency across the board—making construction safer, faster, and more cost-effective.

FAQ

SMED (Single Minute Exchange of Die) training teaches teams how to dramatically reduce changeover and setup times — ideally to under 10 minutes. Developed by Shigeo Shingo at Toyota, SMED systematically separates internal activities (done while a process is stopped) from external activities (done while running), converting as many as possible to external to minimise downtime.

The SMED process follows four key steps: (1) Observe and record the current changeover in detail. (2) Separate internal and external activities. (3) Convert internal activities to external wherever possible. (4) Streamline all activities — standardise, parallelise, and eliminate unnecessary steps. Each step typically delivers 25–50% time reductions, with cumulative reductions of 50–90% achievable.

No. While SMED originated in manufacturing, its principles apply wherever setup, mobilisation, or transition time is a source of waste. In construction, SMED is applied to scaffold erection and dismantling cycles, crane setup, formwork cycles, and area handovers. In healthcare, it is used to reduce theatre turnover times. In logistics, it reduces vehicle loading and dispatch times.

A SMED workshop is typically delivered over 1–2 days. The first half introduces the methodology and principles; the second half involves a live SMED event on an actual process or setup activity. This format ensures participants leave with both conceptual understanding and practical experience, with documented improvements to show leadership immediately.

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