• How often does your team discover an inventory discrepancy -- a system quantity that doesn't match what's on the shelf -- and how long does it take to find the cause?

  • Are purchasing decisions made on inventory data that's hours or days old because the system doesn't update in real time?

Inventory discrepancies discovered at stocktake, not in the system, mean your decisions between stocktakes are based on numbers that aren't real.

Inventory management ERP covers the movement, valuation, and visibility of stock across every location in your business -- from goods receipt at the dock through storage, picking, packing, and dispatch. When inventory lives in a spreadsheet or a system that doesn't update in real time, every decision made between updates is made on stale data: purchasing based on inventory that moved three days ago, production planned against stock that was already consumed.
RaftLabs builds custom inventory management ERP software designed for your stock model -- single-location or multi-warehouse, lot-tracked or serial-tracked, FIFO or FEFO, B2B or B2C fulfilment. Real-time inventory visibility, receiving workflows, pick-pack-ship, replenishment automation, and the integrations with your e-commerce, production, and finance systems that make the inventory record trustworthy.

  • Real-time inventory visibility by location, lot, and serial number -- not yesterday's spreadsheet

  • Goods receipt workflow with inspection and quality hold before stock is available

  • Pick-pack-ship workflow with barcode scanning and dispatch confirmation

  • Reorder point and safety stock management with automated purchase requisition generation

RaftLabs builds custom inventory management ERP software -- real-time stock visibility, goods receipt, pick-pack-ship, lot and serial tracking, replenishment automation, and multi-warehouse support -- designed around your stock model and fulfilment process. Most inventory ERP projects deliver in 12 to 20 weeks at a fixed cost.

Vodafone
Aldi
Nike
Microsoft
Heineken
Cisco
Calorgas
Energia Rewards
GE
Bank of America
T-Mobile
Valero
Techstars
East Ventures

Inventory accuracy isn't a warehouse discipline problem -- it's a systems problem. When transactions are entered manually, they're entered late. When the system doesn't support lot tracking, teams track lots in a separate spreadsheet. When the pick process doesn't require scan confirmation, picks are made from the wrong location and the discrepancy doesn't surface until a customer complaint or a stocktake. The inaccuracies that compound between physical counts aren't random. They follow the same gaps in the system every time.

Custom inventory ERP closes those gaps at the transaction level. Goods receipts post when stock is physically received, not when an administrator processes the paperwork. Pick confirmation requires a scan that matches the expected SKU, location, and quantity -- catching errors before they leave the warehouse. Lot and serial number tracking is part of the core transaction flow, not a workaround maintained alongside the system. The result is an inventory record your purchasing team, production planners, and finance team can trust without checking it against a separate source.

What we build

Real-time inventory visibility

Stock levels by SKU, location, lot, and serial number updated in real time as transactions are posted -- not at end of day or on the next manual import. Available, reserved, and on-order quantities tracked separately so purchasing decisions are based on what's actually free to use. Inventory valuation using FIFO, FEFO, LIFO, or weighted average depending on your accounting and regulatory requirements. Stock age reporting for perishable or slow-moving items. Negative stock prevention with configurable allow/block rules by item category.

Goods receipt and putaway

Purchase order-based goods receipt matching delivery quantities against expected PO lines with discrepancy recording. Receiving inspection workflow with quality hold status preventing stock from entering available inventory until inspected and released. Lot and serial number capture at receipt with expiry date and supplier batch reference recording. Directed putaway to specific bin locations based on product attributes and available capacity. Blind receiving option for unannounced deliveries where a PO reference isn't available at the dock.

Pick, pack, and dispatch

Sales order-based pick list generation with pick sequencing by warehouse zone to minimise travel distance. Wave picking for multi-order picking efficiency during high-volume periods. Barcode scan confirmation at each pick step -- SKU, location, quantity, and lot -- catching errors before the order reaches packing. Packing slip and label generation at the packing station. Carrier integration for shipping label creation and tracking number capture. Dispatch confirmation updating customer-visible order status and triggering the inventory decrement and AR invoice generation.

Multi-warehouse and location management

Multiple warehouse and storage location management with separate stock records per location and per site. Inter-warehouse transfer with transit inventory tracking so stock in transit doesn't appear as available at either location. Location-based pick sequencing for picking efficiency within each warehouse. Bin-level location management for high-density storage environments where aisle, rack, level, and position tracking is required. Consignment stock tracking for supplier-owned inventory held at your facility, with separate visibility from owned stock.

Lot and serial number traceability

Lot tracking from goods receipt through storage, production consumption, and customer dispatch -- every movement recorded against the originating lot. Serial number tracking for high-value or warranty-tracked items with individual unit history from receipt to customer. Full forward traceability from a supplier recall to every customer shipment containing the affected lot. Full backward traceability from a customer complaint to the raw material lot and supplier. Lot expiry date management with FEFO picking enforcement and expiry alert before stock reaches its date in available inventory.

Replenishment and purchase planning

Reorder point and safety stock configuration per SKU and per location with lead time incorporated in the reorder calculation. Automated purchase requisition generation when stock falls below reorder point, eliminating the manual monitoring cycle that purchasing teams run from spreadsheets. Supplier lead time updated from goods receipt history for more accurate reorder timing. MRP-linked replenishment for production-driven demand where purchase requirements flow from the production schedule rather than from a stock level trigger. Purchase order consolidation to reduce order frequency and meet supplier minimum order quantities.

Have an inventory management project?

Tell us your stock model, the locations you manage, and where the current system breaks down. We'll scope the ERP and give you a fixed cost.

Frequently asked questions

Lot tracking records the origin lot for every unit of stock from goods receipt through dispatch. Expiry date management assigns an expiry date to each lot at receipt and enforces FEFO (first expired, first out) picking so the nearest-expiry stock is always picked first. Quality hold at receipt prevents out-of-specification lots from entering available stock. Forward traceability from a lot to all customer shipments containing that lot supports recall management. The specific configuration of lot attributes -- batch number format, expiry date format, quality attributes captured at receipt -- is designed around your product and regulatory requirements.

E-commerce integration (Shopify, WooCommerce, Magento) creates sales orders in the inventory system from web orders, decrements stock on fulfilment, and updates the e-commerce platform with tracking information. 3PL integration requires an API or EDI connection to the 3PL's WMS to send pick instructions and receive confirmation. The integration approach depends on what interfaces your 3PL exposes -- most large 3PLs have EDI or API connectivity, smaller 3PLs may require file-based integration.

Inventory accuracy between full stocktakes is maintained through cycle counting -- counting a subset of locations on a rotating schedule so every location is counted multiple times per year without disrupting operations. Discrepancies found during cycle counts are investigated and adjusted before they accumulate. High-value or fast-moving items are counted more frequently. The cycle count programme is configured in the system with count assignments generated automatically, results recorded by scan, and discrepancies flagged for investigation before adjustment posting.

A core inventory ERP covering real-time stock visibility, goods receipt, pick-pack-ship, and basic replenishment typically runs $30,000 to $70,000. A more complete system with lot tracking, multi-warehouse management, 3PL integration, and e-commerce connectivity typically runs $70,000 to $150,000. Fixed cost agreed before development starts.