The Reality Most ERP Systems Ignore

Manufacturing isn’t neat. For every primary product that rolls off your production line, there are secondary outputs – some valuable, some requiring disposal, all demanding proper tracking and costing. Yet most ERP systems treat manufacturing as a simple input-output equation, forcing businesses to use workarounds, spreadsheets, or simply ignore by-products altogether.

Modern manufacturing ERP systems are taking a different approach. Advanced by-product features acknowledge a fundamental truth: real-world production creates multiple outputs, and your system should handle that reality elegantly.

What Makes By-Products a Game-Changer

At first glance, by-product functionality might seem like a minor technical feature. But for manufacturers dealing with the messy reality of production, it’s transformative. Here’s why it matters:

Accurate Cost Accounting: When you produce lumber, you generate sawdust. When you process food, you create offcuts. Traditional systems force you to absorb these costs entirely into your main product or create complex manual adjustments. Odoo’s by-product feature automatically allocates costs across all outputs based on their actual value, giving you true product profitability.

Inventory Truth: By-products don’t disappear because your system ignores them. They occupy warehouse space, have value, and need tracking. Modern ERP systems automatically create inventory for by-products during manufacturing orders, ensuring your stock levels reflect reality – not an idealized version of it.

Compliance and Traceability: Many industries face regulations around material tracking, waste management, and full lifecycle accounting. When your system natively tracks by-products with lot numbers, locations, and quantities, compliance becomes automatic rather than heroic.

Real-World Applications Across Industries

The by-product feature shines across diverse manufacturing scenarios:

Food Processing: A meat processor produces primary cuts as the main product while generating bones, fat, and offal as by-products. These aren’t waste – they’re sold to pet food manufacturers, rendering plants, and specialty suppliers. Advanced ERP systems track each stream separately, maintaining proper inventory and enabling accurate revenue recognition.

Woodworking: Furniture manufacturers produce sawdust, wood chips, and off-cuts alongside finished pieces. These by-products are sold to particle board manufacturers, landscaping suppliers, or biomass energy plants. The system automatically captures these secondary outputs without additional manufacturing orders.

Chemical Manufacturing: Processing crude materials often yields multiple usable compounds. By-products allow manufacturers to track each output stream, manage different quality grades, and optimize which products to prioritize based on market conditions.

Metal Fabrication: Scrap metal, slag, and other residuals have real value. Tracking them as by-products enables accurate job costing and reveals opportunities to optimize material utilization.

How It Works: Simple Configuration, Powerful Results

The implementation in modern ERP systems is refreshingly straightforward. On any Bill of Materials, you can define by-products alongside your main product. For each by-product, you specify:

• The product itself: Create it in your product catalog just like any other item
• Quantity produced: How much is generated per production cycle
• Cost allocation: What percentage of production costs should be attributed to this by-product
• Operations: Which specific production step generates it

When you create a manufacturing order, the system automatically plans for by-product generation. When workers complete production, the system receives both the main product and all by-products into inventory simultaneously. No additional steps, no manual adjustments, no forgotten outputs.

The Strategic Advantages Hidden in Plain Sight

Beyond operational accuracy, by-product tracking enables strategic insights most manufacturers miss:

True Product Profitability: When costs are properly allocated across all outputs, you discover which products are actually profitable. That “low-margin” main product might look very different when you account for valuable by-products offsetting production costs.

Process Optimization: Tracking by-product yields over time reveals process inefficiencies. Increasing sawdust generation might indicate dull blades or poor material quality. Changing by-product ratios can signal process drift before it impacts main product quality.

Revenue Opportunity Identification: Many manufacturers dispose of by-products that could be monetized. When your system tracks these volumes automatically, patterns emerge that justify developing by-product revenue streams.

Sustainability Reporting: Environmental stakeholders want comprehensive material accounting. By-product tracking provides the data foundation for circular economy initiatives and sustainability reporting without separate tracking systems.

Integration: Where By-Products Become Powerful

By-product functionality doesn’t exist in isolation. It connects seamlessly with the broader ERP ecosystem:

• Accounting: By-products automatically post to inventory at their allocated cost, ensuring financial statements reflect true production economics
• Sales: By-products can be sold like any product, with full sales order and invoicing support
• Quality: Apply quality control points to by-products requiring inspection or certification
• Traceability: Lot and serial number tracking extends to by-products for full chain-of-custody
• Reporting: Standard inventory and production reports include by-products, giving complete visibility

Beyond Features: A Different Philosophy

What makes advanced by-product capabilities noteworthy isn’t technical sophistication – it’s philosophical alignment with manufacturing reality. Too many ERP systems are built on idealized process models that force businesses to conform to software limitations.

Leading ERP platforms take the opposite approach: acknowledging that manufacturing is complex, variable, and inherently messy. By-products are just one example of this philosophy, but they’re emblematic of a broader design principle: the system should adapt to your business, not the other way around.

The Bottom Line

For manufacturers producing anything beyond the main product – whether that’s valuable co-products, saleable scrap, or material requiring proper disposal tracking – modern by-product features eliminate workarounds and reveal hidden insights.

It transforms by-product management from an accounting headache into a source of truth, strategic visibility, and potential value creation. And it does so without adding complexity to daily operations.

In manufacturing, the details matter. By-products are one of those details that, when handled properly, compound into significant operational and financial advantages.

The question isn’t whether your manufacturing process creates by-products. It almost certainly does. The question is whether your ERP system acknowledges that reality and helps you manage it intelligently.

Frequently Asked Questions

Q: What’s the difference between a by-product and a finished product in manufacturing ERP?

A: The main distinction is intent and production planning. Finished products are the primary output you plan to manufacture – they drive the Bill of Materials and manufacturing order. By-products are secondary outputs that result from producing the main product. They’re defined within the BoM but don’t require separate manufacturing orders. Both end up in inventory, but by-products are essentially “bonus” outputs from making something else.

Q: Can I sell by-products like regular products?

A: Absolutely. Once a by-product is received into inventory through a manufacturing order, it functions like any other inventory item. You can create sales orders, set pricing, track stock levels, and invoice customers. The only difference is how it enters inventory – as an automatic output during production rather than through a dedicated manufacturing order.

Q: How does cost allocation work for by-products?

A: You can allocate production costs across your main product and by-products based on percentages you define. For example, if total production costs are $1,000 and you allocate 10% to a by-product, that by-product will carry $100 of cost while the main product carries $900. This ensures accurate inventory valuation and profit margin calculations. You can also set by-products to zero cost if you want the main product to absorb all costs.

Q: Can I have multiple by-products from a single manufacturing order?

A: Yes. A single BoM can include multiple by-products, each with its own quantity, cost allocation, and operation assignment. This is common in industries like food processing or chemical manufacturing where one production run generates several secondary outputs.

Q: Do by-products support lot and serial number tracking?

A: Yes. If your by-product is configured to use lot or serial number tracking, the system will prompt for this information during the manufacturing order completion, just like it does for main products. This is crucial for industries requiring full traceability.

Q: What happens if the actual by-product quantity differs from what’s planned in the BoM?

A: During manufacturing order completion, operators can adjust the actual quantity of by-products produced. This flexibility accommodates normal production variations. Over time, significant deviations from planned quantities can highlight process issues worth investigating.

Q: Can by-products be used as components in other products?

A: Definitely. A by-product from one manufacturing process can be a component in another product’s BoM. For example, sawdust from furniture manufacturing could be a component in pressed wood panels. This creates circular production flows where nothing goes to waste.

Q: How do by-products appear in inventory valuation reports?

A: By-products appear in inventory valuation at their allocated cost, just like any other inventory item. They contribute to your total inventory value and are included in all standard inventory reports. This ensures your financial statements accurately reflect all materials in your possession.

Q: Is there a limit to how many by-products I can add to a BoM?

A: There’s no practical limit. You can define as many by-products as your production process generates. However, consider whether very small or incidental outputs warrant tracking as distinct by-products versus being treated as general waste.