SMED Software: Reduce Changeover Time and Increase Manufacturing Capacity

What Is SMED?

SMED stands for Single Minute Exchange of Die — a lean manufacturing method developed by industrial engineer Shigeo Shingo. Its aim is to reduce setup and changeover time to under ten minutes wherever possible. Although it began with die changes, the principles apply to almost any setup: machine changeovers, tool replacements, product transitions, packaging-line setups, fixture changes, and maintenance preparation. The core idea is simple — identify every activity in a setup, eliminate what is unnecessary, and convert as many activities as possible from internal to external.

Why Changeover Reduction Matters

Many manufacturers underestimate the cost of long setups. Lengthy changeovers reduce machine availability and capacity, raise labour cost, and push teams toward larger batches to avoid switching — which in turn inflates inventory, slows response to demand, and raises obsolescence risk. Cutting setup time reverses this: smaller batches become economical, lead times shorten, and the operation becomes far more agile and responsive.

What Is SMED Software?

SMED software is a manufacturing-improvement tool that analyses, documents, and optimises setup activities. Instead of relying on handwritten notes and memory, engineers capture the changeover in detail and find improvement opportunities objectively. Modern SMED software typically offers video-based setup analysis, time-study functionality, internal/external activity classification, changeover timing reports, workflow visualisation, improvement tracking, standardised setup documentation, and performance dashboards.

How SMED Software Works

A SMED study generally follows six stages:

1. Record the changeover on video — an objective view the team can review repeatedly without disrupting production.
2. Break it into activities — gather tools, remove fixtures, install tooling, adjust settings, inspect, run test parts.
3. Classify each activity as internal or external — the distinction at the heart of SMED.
4. Identify waste — waiting, excess motion, transport, tool searching, duplicate or unnecessary adjustments.
5. Implement improvements — tool carts, quick-release fixtures, standard procedures, pre-staged materials, visual management.
6. Measure results — compare before and after to quantify the gain and sustain it.

Internal vs External Activities

The most important concept in SMED is the split between internal and external work. Internal activities can only be done while the machine is stopped — tool changes, fixture replacement, calibration, die installation — so they directly cause downtime and are the primary target. External activities can be done while the machine keeps running — tool preparation, material staging, documentation review, inspection. Converting internal activities into external ones usually delivers the largest single reduction. SMED software tags every activity on this axis and totals internal and external time separately.

Key Features of SMED Software

Video analysis

Review setups frame by frame, spot wasted motion, measure task durations, and validate improvements — without relying on memory.

Time-study integration

Measure setup activities precisely for accurate timing, standardised measurement, and benchmarking.

Activity categorisation

Classify tasks as internal, external, value-added, or non-value-added to simplify improvement planning.

Reporting and dashboards

Changeover reports, trend analysis, and improvement tracking give management visibility into setup performance.

Standardised documentation

Turn proven setups into standard operating procedures and visual work instructions.

Benefits of SMED Software

• Reduced changeover time — the headline gain, freeing capacity.
• Higher equipment utilisation — less downtime lifts overall equipment effectiveness (OEE).
• More capacity — extra production hours without buying equipment.
• Greater flexibility — smaller batches make make-to-order and customisation viable.
• Lower inventory — shorter setups remove the need for long runs, cutting carrying cost.
• Better training — video documentation improves knowledge transfer and consistency.

An Illustrative Changeover

Consider a typical 95-minute packaging changeover captured on video. The analysis surfaces excess walking, tool searching, duplicate inspections, and poor material staging. The team moves preparation work off the critical path (internal to external), introduces tool carts, standardises the procedure, and pre-stages materials. A changeover of this kind can fall to around 48 minutes — roughly a 49% reduction — with no new equipment. This is an illustrative example of the pattern SMED studies repeatedly find, not a guaranteed result; actual gains depend on the starting process.

SMED and Lean Manufacturing

SMED is a foundational lean method. It attacks waste directly — waiting, motion, transport, and overprocessing — and improves flow by removing changeover bottlenecks. By making small batches economical it supports level production and faster response, and its before/after measurement makes it a natural engine for continuous improvement and operator involvement.

Industries That Use SMED Software

SMED pays off wherever changeovers are frequent: automotive (tooling and fixture changes), food and beverage (cleaning and product changes), packaging (multiple daily changeovers), electronics (rapid product transitions), medical devices (strict, standardised setups), and plastics and injection moulding (tool changes that heavily affect uptime).

Best Practices for Implementation

• Record real changeovers, not theoretical workflows.
• Involve operators — they see opportunities engineers miss.
• Prioritise converting internal activities to external.
• Standardise and document successful changes for consistency.
• Measure setup performance continuously.
• Use video-based analysis for objective evidence and better collaboration.

How Yamazo Studio Accelerates SMED

Yamazo Studio combines video analysis, time study, and a dedicated SMED workflow. Engineers record and review changeovers frame by frame, classify each activity as internal or external (and value-added or non-value-added), and see internal and external setup time totalled separately. From there they generate standardised documentation, track improvements over time, and measure setup performance before and after — all fully offline, with multi-video comparison and structured export, without sending shop-floor footage to the cloud. Published case studies commonly report changeover reductions of 20–75% (Shingo's pioneering work averaged about 94%); Yamazo Studio gives engineers the structure and evidence to pursue gains in that range.