Manufacturing Inventory Management
BOM-aware demand forecasting, raw-material replenishment, and finished-goods planning for scaling manufacturers — without ripping out the MRP you already have.
Built for SME and contract manufacturers managing 100–5,000 finished SKUs, multi-level BOMs, and long-lead components against fast-moving demand.
1-week onboarding · No long-term contract · Plugs into Unleashed, Cin7, Katana
Why manufacturing inventory is the hardest planning problem
A manufacturing business doesn’t hold one inventory — it holds three, each with its own constraints, lead times, and risks.
BOMs cascade demand
One finished SKU isn’t one purchase decision — it’s ten or a hundred component decisions, each with its own lead time and supplier. Forecasting the finished good is the easy part.
16-week components vs 2-week demand spikes
Long-lead components booked in Q1 against demand that materialises in Q3. Get the long-lead call wrong and the finished-goods plan is locked before the demand signal arrives.
WIP that no one sees clearly
Work-in-progress is rarely tracked at the same granularity as raw materials or finished goods. Production cycle times drift, yields slip, and the planning team finds out three weeks late.
Shared components across SKUs
A single component fed into eight finished goods — each with its own demand pattern. Net component demand is the sum; getting it wrong starves the most popular SKU first.
Supplier MOQs that don’t match the run rate
A 5,000-unit MOQ on a component you use 800 of per month. Either you over-buy and tie up six months of working capital, or you renegotiate. Planning needs to flag this, not just live with it.
Cash flow swings as production starts
Component POs go out months before finished goods sell. Without a cash-flow view tied to the production plan, finance finds out about the squeeze when it’s already happened.
What manufacturing inventory planning should actually do
Lumina is built around the work planners and ops leads at scaling manufacturers actually run — not the demo a generic IMS wants to show.
BOM-aware demand forecasting
Forecast on the finished SKU; Lumina automatically calculates component-level demand using your BOM. Multi-level BOMs and shared components handled natively.
Three-state inventory tracking
Raw materials, WIP, and finished goods tracked as distinct states with separate visibility, alerts, and replenishment logic for each.
Component lead-time orchestration
Long-lead components get wider safety windows; short-lead components get right-sized. Per-component policy, not blanket SKU rules — so working capital lands where it actually needs to.
Production-schedule alignment
Match raw-material purchases to the production schedule, not just to historical consumption. Sits upstream of your MRP, feeds it a coordinated demand signal.
Supplier and supplier-payment visibility
Component suppliers managed with payment-term awareness, deposit + balance structures, and a supplier ledger that ties POs to actual cash impact.
Multi-channel finished-goods planning
If you sell across Shopify, Amazon, and wholesale on top of contract manufacturing, the finished-goods forecast handles all of them — and pushes the consolidated requirement back through the BOM.
Sits on top of your MRP and the rest of your stack
Lumina pulls BOM, stock, and sales data directly from your existing systems. We’re a planning layer above your MRP — not a replacement for it.
Don’t see your MRP? Lumina handles arbitrary CSV exports and custom integrations during onboarding.
The full manufacturing planning workflow, in one platform
Each capability stands on its own; together they replace the planner’s 12-tab spreadsheet that ties the MRP, the accounting system, and the production board together by hand.
Demand planning
Finished-goods forecasting per SKU per channel with accuracy + bias tracked per SKU. Feeds directly into the BOM-decomposed component plan.
See demand planningThree-state inventory
Separate visibility on raw materials, work in progress, and finished goods — each with its own alerts and policy.
See inventory managementComponent replenishment
Reorder triggers per component, respecting MOQs and lead times per supplier. Long-lead components get wider safety windows; short-lead components get right-sized.
See replenishmentScenario planning
Model the impact of a launch, a supplier delay on a critical component, or a 20% demand shift before committing to the next production run — not after.
See scenario planningWant to size the basics yourself?
Try the safety stock calculator to compute buffer per component, or the EOQ calculator to find the economically optimal component order size against supplier MOQs. Both are free, no signup.
From signup to live in one week
Lumina onboarding for manufacturers is guided — your BOM, your supplier data, your production calendar — done in five working days. No three-month MRP-style implementation.
- 1
Day 1: Connections
Connect your MRP (Unleashed, Cin7, Katana, or other), accounting (Xero, QuickBooks), and sales channels. Lumina starts pulling BOM, stock, supplier, and demand data immediately.
- 2
Day 2–3: BOM + supplier mapping
Validate the BOM structure pulled from your MRP — including multi-level BOMs and shared components. Map suppliers to components, with lead times and MOQs. Done together, not handed off.
- 3
Day 4: Initial forecast + component plan
First AI-powered finished-goods forecast generated. BOM-decomposed component demand calculated. Reviewed together so you see how the model handles your specific component-level patterns.
- 4
Day 5: Replenishment policy + alerts
Reorder rules calibrated per component, with long-lead-aware safety windows. Stockout and overstock alerts wired up for all three inventory states. Ready to use.
Why scaling manufacturers choose Lumina
The space between “a basic MRP” and “a full enterprise planning suite” is where most scaling manufacturers actually live. Lumina is built for that space.
Basic MRP / IMS
- • Track what’s on hand and what’s in production
- • Basic reorder triggers, no real forecasting
- • BOM is record-keeping, not planning input
- • Long-lead and short-lead components share rules
Lumina
Built for this gap- BOM-aware AI demand forecasting
- Three-state inventory (raw / WIP / finished)
- Per-component lead-time policy
- 1-week onboarding, sits on your existing MRP
Enterprise planning suites
- • 6+ month implementation
- • Rigid workflows and master-data demands
- • Heavy IT and admin burden
- • Designed for enterprise, priced like enterprise
Comparing alternatives in detail? See our Cin7 alternatives guide and NetStock alternatives guide.
Frequently asked questions
What is manufacturing inventory management?+
Manufacturing inventory management is the discipline of planning, tracking, and replenishing the three inventory states a manufacturing business holds at any moment — raw materials, work in progress (WIP), and finished goods. It involves matching raw-material purchases to production schedules, sequencing WIP through the shop floor, and aligning finished-goods stock with downstream demand. Unlike pure-ecommerce inventory management, it's bound by bills of materials, production capacity, and supplier component lead times.
How is manufacturing inventory different from ecommerce inventory?+
Three structural differences. (1) Bill of materials — a finished SKU isn't bought, it's assembled from component SKUs, each with its own lead time. Demand on one finished good cascades into demand on dozens of components. (2) Three inventory states — raw materials, WIP, and finished goods — each managed separately. (3) Production capacity as a constraint — you can't just buy more finished goods to chase demand; you have to schedule production with capacity, labour, and component availability in mind. Ecommerce inventory is about replenishing finished SKUs from suppliers; manufacturing inventory is about orchestrating the whole production system.
Does Lumina handle bills of materials (BOMs)?+
Yes — BOM-aware forecasting and component-level replenishment are core to Lumina's manufacturing workflow. Forecast demand on the finished SKU, and the platform automatically calculates the component-level demand using the BOM, then drives the raw-material replenishment plan against component lead times and supplier MOQs. Multi-level BOMs are supported, including sub-assemblies and shared components across multiple finished goods.
Can Lumina forecast WIP and finished goods separately?+
Yes. WIP and finished-goods stock are tracked as distinct inventory states. The forecasting model projects finished-goods demand and the production plan converts that into a WIP throughput requirement; Lumina then surfaces when WIP needs to start to meet finished-goods stock targets. Throughput, cycle time, and yield are all configurable.
What about production scheduling — does Lumina replace an MRP?+
No. Lumina is a demand-and-inventory planning layer, not a production scheduler. We sit upstream of MRP/MES systems — feeding them an accurate demand signal and a coordinated replenishment plan for raw materials. Customers typically run Lumina alongside Unleashed, Cin7, Katana, or a heavier MRP like SAP Business One. We connect to it; we don't replace it.
What size of manufacturer is Lumina built for?+
Scaling SME manufacturers and contract manufacturers — typically £5–50M annual turnover, with 100–5,000 finished SKUs, BOMs up to three levels deep, and a planner or ops lead spending materially more than half their time in spreadsheets. Below that, spreadsheets and a basic MRP usually suffice. Above that, full enterprise MRP suites (Oracle, SAP S/4HANA) are the typical fit. Lumina is built for the gap in between.
What integrations does Lumina have for manufacturers?+
Direct connectors for Unleashed, Cin7, Katana, and CSV / Excel for any other MRP or shop-floor system. On the accounting side: Xero and QuickBooks. On the sales side: Shopify, Amazon, and any retailer EDI / wholesale CSV exports. The principle is the same as for the ecommerce platform — connect to what you already run, don't force a re-platform.
How does Lumina handle long component lead times against fast finished-goods demand?+
This is the central tension in scaling manufacturing — and the workflow Lumina is most directly designed to solve. We use the BOM-decomposed forecast to push the replenishment trigger back through the production chain: finished-goods demand → WIP requirement → raw-material lead-time-aware reorder. Long-lead components are flagged earlier with wider safety windows; short-lead components are right-sized so they don't tie up working capital. The result is per-component policy, not per-SKU rules.