The verdict in three sentences
A custom multi-warehouse inventory system is justified when replenishment still runs on spreadsheets while sales scatter across several sites. Budget 45,000-95,000 EUR and 4-7 months for a real-time unified view, automatic reorder points, inter-warehouse transfers and cycle counting, all connected to your ERP. The return shows up as -25 % stockouts, reduced dormant overstock and saved data-entry hours.
The problem with a non-unified multi-warehouse setup
When each warehouse manages stock in isolation, you pile up stockouts on one side and overstock on the other. Custom software recentres the data and automates replenishment decisions.
| Issue | Without unified software | With custom software |
|---|---|---|
| Stock view | Per warehouse, spreadsheet | Consolidated, real time |
| Replenishment | Manual, by feel | Automatic thresholds per SKU |
| Inter-warehouse transfers | Calls, emails | Suggested and tracked |
| Inventory | Annual, activity halt | Cycle counting, no halt |
| Stockouts | Frequent | -25 % (order of magnitude) |
| ERP/accounting integration | Re-keying | Two-way API |
What automating replenishment changes
The core value is deciding what to reorder, where and when, without human intervention on stable-rotation SKUs.
| Function | 2026 effect | Estimated gain (order of magnitude) |
|---|---|---|
| Reorder points per SKU/warehouse | Order triggered at the right time | -25 % stockouts |
| Suggested inter-warehouse transfers | Rebalancing existing stock | -12 % dormant overstock |
| Cycle counting | Accuracy without activity halt | +18 pts stock accuracy |
| Expiry/dormancy alerts | Early clearance | Cash freed |
| Multi-site dashboard | Centralised decisions | -6 h/week reporting |
| ERP connection | End of double entry | Accounting reliability |
Mini case study
Karim runs an equipment distributor in Berlin: 4 warehouses, 7,800 SKUs, 14 M EUR revenue. Stockouts cost him lost sales estimated at 210,000 EUR/year, and dormant overstock ties up about 600,000 EUR of cash.
He invests 72,000 EUR in custom inventory software connected to his ERP (delivered in 6 months). First-year results: automatic replenishment -25 % stockouts, about 52,000 EUR of sales recovered; suggested inter-warehouse transfers -12 % overstock, about 72,000 EUR of cash freed; end of double entry and manual reporting, about 6 h/week saved (nearly 300 h/year). Investment paid back in ~14 months, with stock accuracy rising from 82 % to over 96 %.
FAQ
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Can it connect to our existing ERP?
Yes. Custom software interfaces via two-way API with most ERPs (Sage, SAP, Cegid, Odoo…) or through standard file exchange, avoiding any double entry.
How does automatic replenishment work?
You set a reorder point and reorder quantity per SKU and per warehouse, accounting for supplier lead time. The software triggers a purchase proposal as soon as projected stock drops below the threshold.
What is cycle counting?
Instead of a full annual inventory that freezes activity, a small subset of SKUs is counted each day. Accuracy climbs continuously, with no operational halt.
How much does the project cost in 2026?
Budget 45,000-95,000 EUR depending on the number of warehouses, SKU volume and integrations. Hosting and maintenance follow as a monthly recurring cost.
How long does deployment take?
Between 4 and 7 months. It often starts with the unified stock view and transfers, then adds automatic replenishment and cycle counting.
Let's scope your project. Give us your number of warehouses, SKU volume and ERP, and we'll frame a scope with an indicative budget (45,000-95,000 EUR) and timeline. Detailed quote within 48 h. WhatsApp +221 77 596 93 33.
Mohamed Bah
Fondateur, Kolonell
Passionate about digital and entrepreneurship in Africa, Mohamed has been helping Sénégalese businesses with their digital transformation since 2020. Founder of Kolonell, he believes every SME deserves a professional and accessible online présence.
