What is the difference between discrete and process manufacturing?

Discrete manufacturing produces distinct items that can be counted one at a time, such as steel staircases, brackets, or mezzanine frames. Process manufacturing produces continuous outputs measured by volume or weight, such as paint, chemicals, food, or refined metals. The distinction matters because every ERP vendor uses it to qualify shops in or out before a demo. Custom steel fabricators are firmly in the discrete category, which means they need software built around BOMs, routings, and serialized parts rather than batch yields and tank levels.

Is custom steel fabrication considered discrete manufacturing?

Yes. Custom steel fabrication is discrete manufacturing because every product (staircase, frame, mezzanine, weldment, machined bracket) can be unbolted, recounted, and reassembled as a distinct item. More specifically, custom steel sits in the 'custom discrete' or 'project-based ETO' sub-type, not the high-volume repetitive discrete category most ERPs are optimised for. EZIIL is built specifically for this sub-type, with project-based BOMs and routings rather than the stable, repeatable BOMs that high-volume discrete software assumes.

What are the three main types of discrete manufacturing?

The three main sub-types of discrete manufacturing are repetitive discrete (the same product day after day in high volume, such as automotive parts or electronics), custom discrete or project-based ETO (every job is different, such as structural steel, custom equipment, or bespoke metalwork), and batch discrete (small batches of identical products with changeovers between them). Most ERP demos default to repetitive discrete because that is where the volume of the market sits, which is exactly why those tools fail in custom steel shops.

How is custom (ETO) discrete manufacturing different from repetitive discrete?

Repetitive discrete runs the same product day after day at high volume with low variation. Stable BOMs, repeatable routings, MRP-driven planning all fit naturally. Custom discrete (ETO) runs low to medium volume with high variation, where every job has its own BOM and routing. The assumptions that make repetitive discrete software work (stable parts, fixed routings, demand forecasts) are exactly the assumptions that break in custom steel fabrication, which is why EZIIL is built around projects rather than part numbers.

Why does generic discrete manufacturing ERP fail in custom steel shops?

Most discrete manufacturing ERPs are tuned for repetitive discrete workflows: stable BOMs, reusable routings, demand-driven MRP, and inventory planned against a forecast. Custom steel fabricators run the opposite reality, where every job has its own BOM, its own routing, and its own welding map. Dropping a repetitive discrete ERP into a custom shop creates more spreadsheets, not fewer. EZIIL is purpose-built for discrete, project-based custom steel fabrication, not adapted from a repetitive discrete or process platform.

What is the best discrete manufacturing software for custom steel fabricators?

The right software for a discrete custom steel shop is one that treats each job as its own project, supports finite capacity scheduling by department, captures serialized traceability natively, and runs on the shop floor as well as in the office. EZIIL covers all four. Every job has its own BOM, routing, capacity plan, document set, time tracking, and cost actuals, all linked to a single project record so nothing has to be reassembled from 5 spreadsheets at month end.

What is finite capacity scheduling and why does it matter for fab shops?

Finite capacity scheduling means the schedule respects the actual hours available on each resource (welders, CNC machines, paint bay, cranes) rather than assuming infinite capacity. A 30 person fab shop running infinite capacity in Excel is the recipe for the 'eight jobs are all due Friday' surprise. Finite capacity catches the conflict before the order is accepted. EZIIL shows finite capacity by department week by week, so the bottleneck is visible before it ships pain to the shop floor.

What is first-pass yield (FPY) in discrete steel manufacturing?

First-pass yield (FPY) is the percentage of parts that pass inspection the first time, with no rework, rejection, or repair. In discrete steel manufacturing, FPY is the cleanest single measure of shop health because welding rework, fit-up errors, and paint defects all show up in the same number. If FPY is sliding, margin is sliding with it. EZIIL captures FPY automatically through the mobile shop floor app, where each scan is tied to a specific weldment or part.

How do you trace material to part to job in discrete steel fabrication?

Serialized traceability links the mill certificate and heat number on incoming material to each cut part, then to the assembled weldment, then to the finished job and shipment. This is the foundation of EN 1090 in Europe and AISC certification in North America. EZIIL captures the full chain (material certs, welder qualifications, welding procedure specs, NDT reports) against the job rather than in a separate compliance folder, so an audit becomes a query rather than a paper hunt.

What are the practical signs you are running a discrete manufacturing shop?

You are running discrete manufacturing if you count finished items (14 staircases, 220 brackets, 3 mezzanine frames), you cut, weld, machine, or assemble distinct parts that combine into a finished product, each product has a serial number or project reference, quality inspection happens on individual pieces rather than a sample of a batch, and your scheduling problem is 'which order, on which machine, when.' That mental model is exactly what EZIIL is designed around.

How does EZIIL handle EN 1090 and AISC traceability for discrete steel fabricators?

EZIIL captures EN 1090 and AISC traceability natively against each job, not in a separate compliance system. Material certificates, welder qualifications, welding procedure specifications (WPS), and NDT reports are linked to the project, the work order, and the serialized part. The mobile shop floor app records who welded what and when, against which qualified procedure. When the auditor arrives, the trail is already assembled, not reconstructed.

How much does EZIIL cost for a discrete custom steel fabrication shop?

EZIIL uses flat-rate pricing that scales with team size, not transaction volume. The Starter base product is €120 per month for 1 to 15 users, €180 per month for 16 to 50 users, and €290 per month for 51 to 150 users. There is no per-user pricing and no per-transaction fees. Discrete custom fabricators do not run repetitive-discrete transaction volumes, so they should not pay for them. Optional modules (BOM, procurement, EN 1090, subcontractor) are added only when the shop is ready.

Can a custom steel fab shop replace its whiteboard and spreadsheets with one digital system?

Yes, and most shops should once they are running more than a handful of jobs in parallel. The magnetic whiteboard works until there are 12 active jobs and three site projects running at once, at which point the team needs a system everyone can see from anywhere. EZIIL provides a shared digital board, finite capacity scheduling by department, and a mobile shop floor app so the office, the foreman, and the operator are all working from the same live picture rather than three out-of-date copies.

Discrete Manufacturing

What is discrete manufacturing in steel fabrication?

Discrete manufacturing is the production of distinct, countable items that can be picked up, counted, and shipped one at a time. A steel staircase is discrete. A handrail is discrete. A welded weldment, a CNC-cut plate, a bolted moment frame, all discrete.

The opposite is process manufacturing, which produces continuous outputs measured by volume or weight: chemicals, food, paint, refined metals. You cannot count a batch of paint the way you count steel beams.

For custom steel fabricators, the answer is simple: you are a discrete manufacturer. Everything you build can be unbolted, recounted, and reassembled. That technical fact has big implications for how you should run the shop and which software actually fits.

Why discrete manufacturing matters for custom steel fabricators

It matters because every ERP vendor on the planet uses this word to qualify you in or out before you even see a demo.

When a vendor asks “are you discrete or process manufacturing?” they are deciding which version of their product to put in front of you. The wrong answer puts you into the chemicals or food module, with bills of materials measured in liters and routings designed for continuous flow. You will spend the next demo wondering why nothing fits.

Inside the discrete category there are also important sub-types that determine fit:

Repetitive discrete: The same product, day after day, in volume. Automotive parts, white goods, electronics assembly. High volume, low variation.
Custom discrete (ETO/project-based): Every job is different. Structural steel, custom equipment, bespoke metalwork. Low to medium volume, high variation. This is you.
Batch discrete: Small batches of identical products, then changeover. Many job shops live here.

Most ERP demos default to repetitive discrete, because that is where the volume of the manufacturing software market sits. If you are custom or project-based, the assumptions in those tools (stable BOMs, repeatable routings, MRP-driven planning) do not match your reality. This is why “discrete manufacturing ERP” is not the same thing as “fabrication ERP.”

How discrete manufacturing shows up in a steel shop

Practical signs you are running discrete manufacturing:

You count finished items: 14 staircases, 220 brackets, 3 mezzanine frames.
You cut, weld, machine, or assemble distinct parts that combine into a finished product.
Each finished product has a serial number, a heat number trace, or a project reference.
Quality inspection happens on individual pieces, not on a sample of a batch.
Your scheduling problem is “which order, on which machine, when,” not “how to keep the line running 24/7.”

The mental model your software needs to support is: distinct jobs, each with their own BOM and routing, sharing finite shop floor resources (welders, CNC machines, paint bay, cranes). That is the discrete fabrication scheduling problem.

Best practices for running a discrete manufacturing fab shop

Build the routing once, reuse it deliberately. Even custom shops have 5 to 15 “shapes” of routing (structural welded, machined bracket, finished handrail, etc.). Define them once, assign them per job, edit the deltas. This is how you keep planning sane.
Finite capacity scheduling beats infinite. A 30 person fab shop running infinite capacity in Excel is the recipe for the “8 jobs are all due Friday” surprise. Pick a tool that respects real capacity.
Track first-pass yield (FPY). In discrete manufacturing, FPY is the cleanest measure of shop health. Welding rework, fit-up errors, paint defects. If FPY is sliding, your margin is sliding.
Trace material to part to job. Discrete = serialized, and serialized requires traceability. Heat numbers, mill certs, weld procedure specs. This is also the foundation of EN 1090 and AISC compliance.
Use a shared digital board. The whiteboard with magnets is fine until you have 12 active jobs and three site projects in parallel. Then you need a system everyone can see from anywhere.

How EZIIL helps discrete custom steel fabricators

EZIIL is purpose-built for discrete, project-based custom steel fabrication, not adapted from a process or repetitive discrete platform. The difference shows up in the details:

One project, one source of truth. Every job has its own BOM, routing, capacity plan, document set, time tracking, and cost actuals, all linked. You do not piece this together from 5 spreadsheets.
Finite capacity by department. Welding, CNC, paint, assembly, fitting. See exactly which department is overloaded next week before you accept the next order.
Mobile shop floor app for serialized tracking. Operators scan, time-track, and capture status on iOS or Android. Each scan is tied to the specific weldment or part, so FPY and traceability come for free.
EN 1090 and AISC traceability native. Material certs, welder qualifications, NDT reports, all captured against the job. No separate compliance folder.
Flat-rate pricing that scales with your team, not your transaction volume. €120/month for 1 to 15 users, €180 for 16 to 50, €290 for 51 to 150. No per-user pricing, no per-transaction fees. Discrete fabricators do not have repetitive-discrete transaction volumes, and they should not pay for them.

If you are a discrete custom steel fabricator weighing your software options, the question is not “do we need discrete manufacturing software?” The question is “do we need software built for custom discrete or repetitive discrete?” If you are custom and project-based, take a free EZIIL product tour and see what fabrication-specific looks like.