The 8 Wastes in Manufacturing — and How to Reduce Them in Your Shop
MetalNow Team · March 24, 2026
If you run a machine shop or fabrication business, you already know this:
Margins are tight. Delays are costly. And inefficiencies add up fast.
One of the most effective ways to improve profitability is by eliminating waste.
What Are the 8 Wastes in Manufacturing?
In Lean Manufacturing, there are eight common types of waste that reduce efficiency and profitability:
- Transportation
- Inventory
- Motion
- Waiting
- Overproduction
- Overprocessing
- Defects
- Skills (unused talent)
These wastes can be remembered using the acronym TIMWOODS.
If you're new to Lean principles, this concept comes from the Toyota Production System.
Understanding how these show up in your shop and how to reduce them can have a major impact on your operations.
Transportation Waste
What it is
Unnecessary movement of materials between locations.
In a shop, this looks like
- Moving raw material between multiple storage areas
- Driving to pick up material from suppliers
- Inefficient shop layout
How to reduce it
- Source material closer to where it's used
- Use reliable delivery instead of pickups
- Simplify material flow
How MetalNow helps
MetalNow delivers directly to your shop, eliminating unnecessary trips and reducing handling. Less movement means more time spent on production.
Inventory Waste (One of the Biggest Cost Drivers)
What it is
Holding more material than you actually need.
In a shop, this looks like
- Ordering full sheets or bars when only part is needed
- Leftover drops sitting unused
- Cash tied up in excess material
Why it matters
- Cash
- Floor space
- Time to manage stock
How to reduce it
- Order only what you need
- Reduce minimum order sizes
- Improve planning
How MetalNow helps
MetalNow allows you to order exact quantities and cut sizes, so you don't have to buy full sheets or bars. This reduces leftover material, frees up cash, and keeps your shop lean.
Explore available materials and sizes:
Motion Waste
What it is
Unnecessary movement of people.
In a shop, this looks like
- Searching for material
- Walking across the shop repeatedly
- Navigating cluttered workspaces
How to reduce it
- Organize inventory
- Reduce clutter
- Improve layout
How MetalNow helps
Less excess material means a more organized shop. Your team spends less time searching and more time producing.
Waiting Waste
What it is
Idle time when work is delayed.
In a shop, this looks like
- Waiting on material deliveries
- Jobs delayed due to stock shortages
- Machines sitting idle
How to reduce it
- Improve supplier responsiveness
- Use predictable delivery schedules
- Reduce lead times
How MetalNow helps
Fast, reliable delivery helps you get material when you need it so your machines and team stay productive.
Overproduction
What it is
Producing more than needed or earlier than needed.
In a shop, this looks like
- Making extra parts "just in case"
- Stockpiling inventory
- Running jobs ahead without demand
How to reduce it
- Align production with real demand
- Improve material availability
- Source metal quickly
How MetalNow helps
When you know you can get material quickly, there's less need to overproduce. You can run jobs when they're needed, not just when material is available. MetalNow provides remnants that are discounted and can ship out fast.
Overprocessing
What it is
Doing more work than necessary.
In a shop, this looks like
- Extra cutting or prep work
- Rehandling material multiple times
- Complex or redundant steps
How to reduce it
- Simplify workflows
- Eliminate unnecessary steps
How MetalNow helps
Ordering material closer to final size reduces cutting and prep time, streamlining your process.
Defects
What it is
Errors that result in scrap or rework.
In a shop, this looks like
- Incorrect material sizes
- Quality issues
- Rework due to mistakes
How to reduce it
- Standardize inputs
- Improve material consistency
- Reduce handling
- Source high-quality metal
How MetalNow helps
Consistent, accurate material sourcing helps reduce variability and errors in production.
Skills (Unused Talent)
What it is
Not fully utilizing your team's abilities.
In a shop, this looks like
- Skilled workers managing inventory instead of machining
- Time spent sourcing material instead of producing parts
- Manual processes that could be streamlined
How to reduce it
- Simplify procurement
- Automate ordering
- Let skilled workers focus on high-value tasks
How MetalNow helps
By simplifying ordering and delivery, your team can focus on production and not chasing down material.
Why Reducing Waste Matters
- Profit margins
- Lead times
- Throughput
- Customer satisfaction
Material sourcing impacts nearly every category in TIMWOODS.
With the right approach, you can reduce:
- Inventory waste (no excess material)
- Waiting (faster delivery)
- Motion (less searching and handling)
- Overprocessing (less cutting and prep)
- Transportation (no supplier trips)
Optimizing how you buy metal is one of the fastest ways to improve your operation.
Final Thoughts
The TIMWOODS framework is simple, but powerful.
If you look closely, you'll likely find multiple types of waste happening every day, especially around material handling and inventory.
By making smarter decisions about how and when you source metal, you can reduce waste, improve efficiency, and increase profitability.
If excess inventory, delays, or material waste are slowing you down, it may be time to rethink your sourcing strategy.
MetalNow helps fab shops, machine shops and more:
- Order only what they need
- Get material delivered quickly
- Reduce waste and keep jobs moving