AI Cutting Optimiser: The Complete Guide to Linear Cutting Optimisation

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GoSmarter Cutting Plans is AI cutting optimiser software that reduces rebar and long product scrap rates to under 2.5% — from the industry average of 5–8% — by calculating the mathematically optimal way to cut your stock for every open order. A production trial with Midland Steel across 734 tonnes confirmed 50% scrap reduction versus manual planning.

What Is Cutting Optimisation Software?

Cutting optimisation software calculates the mathematically optimal way to cut standard-length stock bars into customer-specified lengths, minimising material waste. For long-products manufacturers — rebar, sections, pipe, bar stock — it replaces manual cut planning with an algorithm that evaluates thousands of combinations in seconds and returns a bar-by-bar cut list your saw operators can work from directly.

GoSmarter Cutting Plans is cutting optimisation software purpose-built for metals manufacturers. It is also cut list software and cutting plan software: it takes your inventory and open orders as inputs and outputs a structured cut plan, exportable as PDF or CSV. Start your free trial →

Every tonne of scrap you generate is material you paid for and cannot sell at full price. Scrap steel goes out at 40p in the pound. That is a 60% loss on every kilogram that lands in the skip instead of in a customer order.

The reason most of that scrap exists is not careless operators. It is a planning problem. The number of ways to cut 50 orders from 200 bars of stock is far beyond what any human can optimise by hand. The best answer requires an algorithm. That is what cutting optimiser software is for.

GoSmarter Cutting Plans is available on a free trial — no credit card required. Start your free trial →

What Is Linear Cutting Optimisation?

Linear cutting optimisation solves one specific problem: given a set of required cut lengths and a set of available stock lengths, what is the minimum-waste combination of cuts?

The industry calls this the one-dimensional cutting stock problem (1D-CSP) — you are working along a single dimension (the length of a bar, beam, or section). Unlike sheet metal cutting, which involves two dimensions, linear cutting optimisation applies to long products: rebar, structural beams, angle iron, hollow sections, tube, pipe, and bar stock.

The maths behind it is well-established. The problem belongs to a class called NP-hard, meaning the number of possible solutions grows exponentially with the number of orders and bars. A good algorithm explores that search space and finds the near-optimal answer in seconds. A human with a spreadsheet cannot.

Why the 1D Cutting Stock Problem Requires an Algorithm

For a small job — ten orders from five bars — an experienced planner can work through the combinations in a few minutes. For a typical day at a service centre — 80 orders across 150 bars of different grades and lengths — the number of valid combinations is in the billions. No human can evaluate that search space in any reasonable time. The algorithm can. That is the core reason cutting optimiser software exists: not because the concept is complicated, but because the scale of the problem makes human computation impractical.

How Cutting Optimiser Software Works

Cutting optimiser software takes two inputs: your stock inventory (what bars you have, their actual lengths and grades) and your open orders (what lengths your customers need, in what quantities and grades).

It outputs a cut plan: a structured list of exactly which bars to cut, in what sequence, into what lengths, with the predicted scrap per bar. This cut plan is your production schedule for the saw.

The workflow is straightforward:

Upload or sync your inventory and orders
The algorithm runs — typically in a few minutes
You review the cut plan and override any cuts you want to change (the software recalculates scrap impact immediately)
Export to PDF or CSV for the shop floor

What you do not do: sit with a calculator, a yellow legal pad, and a very strong coffee trying to figure out how to squeeze 14 orders from three bundles of 12-metre bar. That morning is over.

What Happens When You Override a Cut

Cutting optimiser software is not a black box that takes control away from the planner. GoSmarter’s Cutting Plans generates the first-draft cut plan and gives it to you to review. If you know something the system doesn’t — a bar is reserved for a specific job, a customer has moved their delivery forward, the saw is down for maintenance — you override the cut and replan. The algorithm recalculates in seconds, incorporating your change and generating a fresh minimum-waste plan for the remaining work. The expertise stays with your team. The algorithm handles the maths.

The Steel Cutting List Generator

The steel cutting list generator is the output layer of a cutting optimiser. It translates the algorithm’s solution into a format your shop floor can actually use.

A good steel cutting list generator produces:

Bar-by-bar instructions — exactly which bar from your inventory, exactly what cuts in what order
Offcut tracking — every remnant above your minimum usable length is flagged for re-stocking rather than binning
Scrap percentage per bar — so your floor team can see in real time whether the plan is working
Export formats — PDF for printing and pinning, CSV for feeding into your ERP or CNC machine
Grade compliance flags — cut instructions that respect grade and certificate requirements per order

GoSmarter’s Cutting Plans includes a steel cutting list generator as standard. Export your cut plan to PDF in one click or to CSV to feed into downstream systems.

Why the format of the steel cutting list matters

A cut plan is only useful if the people doing the cutting can follow it without stopping to ask questions. The best steel cutting list generators present the information bar by bar — one bar, all cuts, the remnant. Simple. The worst ones produce a matrix that requires interpretation. Your saw operator does not have time to interpret.

GoSmarter’s cut list is designed for the saw floor, not the office. Each bar gets its own section. The cuts are listed in sequence. The expected remnant is shown. If the remnant is above the minimum length for tracking, it is flagged as a stock item with a label to print.

How the Cut List Connects to Your ERP and Systems

The cut plan is only useful if it reaches the right people in the right format. GoSmarter exports cut lists as PDF (for printing and pinning at the saw) and CSV (for importing into your ERP, job management system, or production scheduling tool). If you use a REST API, you can pull the cut plan programmatically and push it into any downstream system. No dedicated connectors, no middleware project — the same open-standard formats that every ERP understands.

Rebar Cutting Optimiser: Why Rebar Is the Hardest Case

Rebar is the most demanding application for a cutting optimiser. Here is why.

Rebar fabricators typically handle hundreds of jobs simultaneously. Each job has multiple bar sizes. Each bar size has many different cut lengths. Every bar must be certified to the correct grade: BS 4449, A500, or Grade 60 depending on the specification. And it all needs to be planned before the saw starts for the day. In the UK, BS 4449 is the dominant standard for structural rebar. The planning burden is compounded by the range of diameters and delivery lengths that UK stockholders and fabricators routinely hold.

Manual planning in this environment consistently produces scrap rates between 5% and 8%. Industry best practice targets 2.5%. The gap between 5% and 2.5% sounds modest. At scale, it is the difference between a profitable operation and one that is quietly haemorrhaging margin on every bundle cut.

A rebar cutting optimiser closes that gap. GoSmarter’s Cutting Plans was built and tested with Midland Steel, a UK rebar and long products manufacturer. In a two-week production trial across 193 jobs and 734 tonnes of steel, the optimiser delivered a scrap rate of below 2.5%.

What makes a rebar cutting optimiser different from generic software

Not all cutting optimiser software is built for the rebar environment. The best cutting optimiser for rebar handles the specific constraints rebar fabrication imposes:

Multiple bar diameters within the same cut plan
Grade and certificate compliance per order (no mixing S355 material into an S275 job)
BS 4449, A500, and Grade 60 specifications
Manual overrides without breaking the plan integrity
Offcut tracking back into inventory as usable stock, with heat number and certificate linked
Works from your live order book, not a batch file
Exports in formats your shop floor already uses — PDF for the saw operator, CSV for the office

Because grade is a hard constraint, the optimiser never substitutes a BS 4449 bar for A500 material, even when the lengths are identical. Multi-grade stock is sorted automatically. Each specification gets its own allocation pass.

If your rebar operation is currently planning cuts on a spreadsheet or a basic MES, the best way to see the gap is to run the optimiser on a single week of real orders and compare the predicted scrap to what you are currently generating.

Rebar Cutting Optimisation in the UK: BS 4449, A500, and Grade 60

UK rebar fabricators work primarily with BS 4449 (the British and European standard), though A500 and Grade 60 material arrives via import routes, particularly from Turkish and Spanish mills. A rebar cutting optimiser must treat each specification as a separate grade pool — A500 material allocated to a BS 4449 job is a compliance failure, not just a planning error. GoSmarter enforces grade separation as a hard constraint. When your stock includes multiple rebar specifications, the optimiser allocates each pool independently and never mixes grades, even when the bar lengths are identical.

Optimise Steel Beam Cutting: The Structural Steel Case

When you need to optimise steel beam cutting, the stakes are higher per cut. Structural members — universal beams (UB), universal columns (UC), parallel flange channels, hollow sections cost significantly more per tonne than rebar. A mis-cut 610×305mm UB goes straight to scrap. You are not bending that back into shape. Getting the plan right first time matters.

The cutting optimiser handles structural sections alongside rebar and other long products. If your business handles a mix of rebar fabrication alongside structural beams you can plan both within the same system.

Where beam cutting efficiency breaks down

Structural beam cutting typically fails at two points:

Under-optimised batch planning. Structural beams are purchased in standard lengths, but project orders require non-standard cuts. Without a cutting optimiser, the default is often to buy new full-length beams when shorter offcuts from previous jobs could cover the requirement. The optimiser checks your offcut inventory first.

Offcut waste. Structural offcuts are valuable because the sections are expensive. A 300mm offcut from a 7m UC might cover a short-span column in a future job. Without systematic offcut tracking, it goes to scrap. GoSmarter tracks every offcut above the minimum usable length automatically, with its certificate and heat number attached.

The difference between 1D optimisation and manual beam planning

Manual beam planning for structural steel often works on a job-by-job basis: allocate stock to this job, deal with offcuts later. A cutting optimiser works across all open jobs simultaneously. It sees that the offcut from Job A can service Job B, and plans accordingly. The result is lower aggregate scrap and lower raw material consumption across the whole production window, not just a single job.

Pipe, Tube, and Bar Stock Optimisation

The same 1D cutting optimisation logic applies to all round and hollow long products: circular hollow sections (CHS), rectangular hollow sections (RHS), square hollow sections (SHS), round bar, flat bar, and pipe. The planning challenge is identical — fulfil a set of required lengths from a set of available stock lengths, minimise scrap — and the algorithm handles it the same way.

For pipe and tube, the additional complexity is wall thickness specification. GoSmarter treats bore and wall thickness as separate stock attributes, ensuring a 114.3×4mm CHS is never allocated to a job specifying 114.3×6mm. The compliance constraint logic that applies to rebar grades applies equally to structural hollow section specifications.

When to Plan Multiple Product Types Together

Many metals service centres and fabricators hold mixed stock: rebar, structural sections, hollow sections, and bar in the same yard. Planning them together in a single optimisation pass means the algorithm can identify cross-product efficiency opportunities — for example, fulfilling a short structural section order from an offcut that would otherwise be scrapped from a beam job. GoSmarter handles multi-product planning runs in a single pass.

Cutting Plan Efficiency: The Metric That Matters

Cutting plan efficiency is the percentage of material in your cut plan that ends up in a saleable product rather than in the skip.

Formula: (saleable output weight ÷ total material consumed) × 100

A cutting plan efficiency of 97.5% means 2.5% scrap. That is the industry target for rebar and long products. Manual planning often delivers 92–95% efficiency. A well-tuned cutting optimiser consistently delivers 97–98%.

The difference sounds small. It is not.

At 500 tonnes per month of rebar throughput:

5% scrap = 25 tonnes of scrap per month
2.5% scrap = 12.5 tonnes per month
At £600/tonne new material vs £220/tonne scrap recovery, the cost gap is £380 for every tonne of excess scrap
12.5 extra tonnes per month × £220 = £4,700 per month in avoidable losses
Over a year: £57,000 in margin you didn’t have to lose

Measuring cutting plan efficiency also tells you when something has gone wrong. A plan that should deliver 97.5% efficiency but is delivering 94% on the floor means either the plan is not being followed, the stock data is wrong, or material has been measured incorrectly. The metric gives you the signal. GoSmarter’s reporting gives you the breakdown by job and by period so you can find the source.

How to Calculate Your Current Cutting Plan Efficiency

To get your baseline, take the last four weeks of cut records. For each day’s cutting:

Add up the total weight of material allocated to the saw (your opening stock for that run)
Add up the weight of finished product that went to picking and despatch
Divide finished weight by opening weight and multiply by 100

The result is your actual cutting plan efficiency for that period. If the number is below 97%, you have identifiable margin sitting in the skip. At 500 tonnes per month and 3% excess scrap, that is 15 tonnes — roughly £5,700/month at the average scrap recovery price versus the cost of new prime stock.

What Efficiency Target Should You Aim For?

Industry best practice for rebar and long products is ≥97.5%. Most operations planning manually sit between 92% and 95%. The gap between 95% and 97.5% is the addressable yield improvement that a cutting optimiser delivers. For structural sections, where material cost per tonne is higher, even a 1% improvement in cutting plan efficiency can be worth more per month than the entire cost of the optimiser software.

How Cutting Optimiser Software Connects to Your Systems

Cutting optimiser software needs to receive order and inventory data, and return cut plans to wherever your team works. GoSmarter connects in three ways:

CSV import/export — upload your stock and orders as a spreadsheet, download the cut plan as CSV or PDF. No IT involvement. Works immediately.
REST API — push order and inventory data programmatically from your ERP, WMS, or production system, and retrieve cut plans via API. Supports real-time integration with any system that has an API.
Manual entry — for smaller operations, stock and orders can be entered directly in the GoSmarter interface.

What Integration With Your ERP Actually Looks Like

Most GoSmarter customers start with CSV import, prove the scrap savings, and then scope API integration as a second phase once the business case is clear. The typical ERP integration connects two data flows: inventory sync (your ERP’s stock positions flowing into GoSmarter before each planning run) and cut plan return (GoSmarter’s output flowing back into your ERP’s production scheduling module). Both flows use standard REST endpoints. GoSmarter’s integration strategy guide documents the API specification and common integration patterns for Infor, Epicor, Dynamics 365, and Sage.

How to Evaluate Cutting Optimiser Software

Not all cutting optimiser software is the same. Before you commit to a tool, ask these questions:

Key Questions to Ask Any Cutting Optimiser Vendor

Question	Why It Matters
Does it handle multi-grade, multi-dimension planning in one pass?	Single-grade tools require multiple manual runs; that is extra work, not less
Does it enforce grade compliance as a hard constraint, not a preference?	Grade substitution is a compliance failure in certified steel work
Does it track offcuts back into inventory with heat number and certificate?	Without this, offcut value is lost and traceability gaps appear
Can you override individual cuts without re-running from scratch?	Real shop floors need this — orders change, machines go down
What scrap reduction does it deliver in production, not demo conditions?	Ask for verifiable proof points from real operations
How long does implementation take?	If the answer is “several months,” it is an ERP, not a cutting optimiser
What is the pricing model?	Per-user pricing penalises team growth; workspace pricing does not

GoSmarter answers these questions directly on the Cutting Plans product page with verified data from the Midland Steel production trial.

Frequently Asked Questions

What is a cutting optimiser and how does it work?

A cutting optimiser is software that calculates the most efficient way to cut your long-product stock to fulfil your open orders. It takes your inventory (available bars, their lengths and grades) and your orders (required lengths, quantities, and specifications), runs a mathematical optimisation algorithm, and produces a cut plan showing exactly which bar to cut, into what lengths, in what sequence. The output minimises scrap and maximises cutting plan efficiency.

What types of products can cutting optimiser software handle?

Cutting optimiser software for linear materials handles all long products: rebar, structural beams (UB, UC, RSJ), hollow sections (SHS, RHS, CHS), angle iron, flat bar, round bar, tube, pipe, and wire rod. It is not designed for sheet metal or plate, which require two-dimensional nesting optimisation.

How does linear cutting optimisation differ from manual cut list planning?

Manual cut list planning relies on experience and intuition. The planner looks at the orders, picks bars from stock, and allocates cuts based on what seems sensible. For small volumes this works reasonably well. As the number of orders and bar types grows, the search space becomes too large for manual evaluation. A good algorithm evaluates millions of combinations and finds the near-optimal solution. The result is consistently lower scrap, typically two to four percentage points better than a skilled human planner.

Is GoSmarter's Cutting Plans the best cutting optimiser for rebar?

GoSmarter’s Cutting Plans is purpose-built for long product manufacturers, with the rebar environment as the primary design target. GoSmarter ran a production trial with Midland Steel across 193 jobs and 734 tonnes of rebar and long products. If you are fabricating rebar and generating more than 3% scrap, it is worth a trial.

Can the cutting optimiser integrate with our existing ERP?

Run GoSmarter standalone by uploading your orders and inventory data via CSV or alongside your existing systems. Native integrations are in development. For most businesses, the CSV import and export workflow is sufficient to start seeing results within a week.

How does the steel cutting list generator handle offcuts?

Offcuts above your configurable minimum usable length are flagged in the cut plan as trackable stock. GoSmarter records them in inventory with their linked heat number and certificate. When a future order can be fulfilled from an offcut, the optimiser automatically includes it in planning. Offcuts below the minimum threshold are counted as scrap.

How long does it take to generate a cut plan?

For a typical day’s orders of 20 to 100 jobs across a few bar sizes the optimiser generates a cut plan in under a minute. Larger planning windows with more jobs take longer but rarely more than a few minutes. The planning that used to take a morning now takes a coffee break.

How does the cutting optimiser handle multi-grade, multi-dimension stock?

GoSmarter Cutting Plans treats grade as a hard constraint, not a preference. A BS 4449 bar and an A500 bar of the same length are never mixed in the same cut plan, even when the dimensions match. The optimiser allocates stock grade by grade and generates separate cut plans per specification.

For multi-dimension requirements — multiple bar diameters or section sizes across the same job — each size is planned independently against the relevant stock. Orders requiring mixed grades and sizes across the same day are handled in a single planning run, with the algorithm generating the minimum-waste allocation across all constraints simultaneously.

Does GoSmarter's Cutting Optimiser work with saw lines, laser cutting, and plasma cutting machines?

GoSmarter generates cut plans and cut lists — the instruction set that tells the operator which bar to pick up and how to cut it. The optimiser is machine-agnostic: whether you are running a circular saw line, a band saw, a plasma table, or a laser, the cut plan output is the same. The system does not connect directly to machine controllers today. If direct Control Numerical Control (CNC) or machine integration is important to your operation, add your vote on our ideas board — we review and prioritise features based on customer demand.

GoSmarter Cutting Plans product page — features, pricing, and free trial
Scrap, Waste & Yield Optimisation — the complete guide to reducing material waste
Production Planning Solutions — how the Cutting Optimiser fits into your workflow
Midland Steel Manufacturing Case Study — 50% scrap reduction in production trials
AI for Metals Manufacturing — how AI applies across the metals industry
Smart Cuts, Less Scrap: 1D Cutting Stock Problem — the mathematics behind the optimiser
What Is Cutting Optimisation? — a plain-English explainer
Metals Manufacturing Glossary — plain-English definitions for yield rate, off-cuts, and more

GoSmarter is made by Nightingale HQ, a UK-based AI company building practical tools for metals manufacturers since 2018.