The verdict in three sentences
An industrial parts distributor managing 22,000 SKUs and EUR 4.5 million in inventory can target a 12 to 20% inventory reduction with demand forecasting by product family, provided it has at least three years of clean sales history. The gain does not come from a magic algorithm but from fine segmentation (fast movers, intermittent items, rare maintenance parts) and reorder points recalculated every week. A custom application connected to your ERP usually pays for itself in under 12 months when the stockout rate is above 5%.
Why classic forecasting fails on 22,000 SKUs
Many distributors around the Port of Amsterdam and in the Westpoort logistics area still set safety stock by hand, often "two months of consumption" across the whole catalogue. The outcome is predictable: too much stock on bearings and fasteners that sell well, and stockouts on maintenance parts that move three times a year but stop a customer's production line when missing.
A modern forecasting model treats each family differently. Items with steady demand suit exponential smoothing or a gradient boosting model enriched with seasonality. Intermittent items, often 50 to 60% of an industrial catalogue, need a dedicated method (Croston or its variants) and a differentiated service level.
| SKU segment | Share of catalogue (estimate) | Suitable method | Target service level |
|---|---|---|---|
| Fast movers (A) | 8 to 12% | Gradient boosting + seasonality | 98% |
| Medium movers (B) | 20 to 25% | Exponential smoothing | 95% |
| Intermittent (C) | 45 to 55% | Croston, bootstrapping | 90 to 93% |
| Critical maintenance parts | 5 to 8% | Business rule + minimum stock | 99% |
| End of life | 5 to 10% | No replenishment, clearance | Not applicable |
| New items without history | 2 to 4% | Analogy with a similar family | 92% |
The 7% stockout rate seen at many distributors comes precisely from poor handling of C items and critical parts.
Data, budget and timeline of a forecasting project
The starting point is history: customer orders line by line, supplier receipts, actual lead times, recorded stockouts. Three years capture two full seasonal cycles. Expect 4 to 6 weeks of data cleaning before the first useful model.
| Option | Indicative 2026 cost | Setup time | Limits |
|---|---|---|---|
| Forecasting module built into the ERP | EUR 15,000 to 40,000 excl. VAT + annual licence | 3 to 6 months | Generic models, little tuning per family |
| SaaS planning software | EUR 1,500 to 6,000 per month (estimate) | 2 to 4 months | High recurring cost on 22,000 SKUs |
| Supply chain consultancy | EUR 60,000 to 150,000 excl. VAT | 4 to 8 months | Deliverable often a study |
| Kolonell custom application, medium complexity | 4,000,000 to 7,000,000 FCFA (EUR 6,100 to 10,670) | 10 to 16 weeks | Requires a data contact on the client side |
| Kolonell custom application, complex (multi-warehouse, two-way ERP) | 7,000,000 to 15,000,000+ FCFA (EUR 10,670 to 22,870+) | 16 to 24 weeks | Scope must be framed carefully |
| Kolonell application maintenance | 35,000 / 75,000 / 120,000 FCFA per month (EUR 53 / 114 / 183) | Ongoing | Model retraining included depending on plan |
A simple version, limited to a forecasting dashboard per family and reorder alerts, sits between 2,500,000 and 4,000,000 FCFA (EUR 3,810 to 6,100). Specific connectors and hosting are set in the quote.
What the tool must deliver every day
A good forecasting tool does not replace the buyer, it prepares their decisions. In practice: a list of suggested purchase orders every Monday, sorted by urgency, with suggested quantity, forecast stockout date and confidence level. The buyer approves, adjusts or rejects, and every correction feeds the model. You also need forecast error tracking (MAPE or bias) per family to see where the model is wrong and why.
Integrations are standard: daily extraction from the ERP (Exact Globe, AFAS, Microsoft Dynamics 365 Business Central or SAP Business One), export of suggested orders to purchasing, and email notifications for critical alerts.
Mini case study
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Sanne, supply chain director at an industrial parts distributor in Amsterdam, manages 22,000 SKUs and EUR 4.5 million in inventory. Her annual carrying cost (financing, warehousing, obsolescence) is estimated at 20% of inventory value, or EUR 900,000 a year.
After 6 months with a family-level forecasting tool, she targets a 14% inventory reduction, freeing EUR 630,000. Carrying cost savings reach 0.14 × 900,000 = EUR 126,000 a year. At the same time, the stockout rate drops from 7% to 4%. On EUR 18 million revenue, if a stockout loses 30% of affected sales, the recovered margin (28% gross margin) is about 18,000,000 × 3% × 30% × 28% = EUR 45,360. With a complex project around EUR 22,000 and maintenance at EUR 183 per month, payback comes within three months of going live.
FAQ
Do we really need three years of history?
Two years are enough to start on fast movers, but three years capture two full seasonal cycles. Without them, forecast error often stays 10 to 15 points higher on seasonal items.
Will AI replace our buyers?
No, it prepares suggestions that buyers approve. In practice, a buyer handling 4,000 SKUs saves 6 to 10 hours a week on replenishment calculations.
What about rarely sold critical parts?
They follow a business rule with a guaranteed minimum stock and a 99% service level. The statistical model only adjusts that minimum once a quarter.
How long before inventory goes down?
First effects appear after 2 to 3 replenishment cycles, around 3 to 4 months on average. The 12 to 20% reduction is usually visible over 9 to 12 months.
Is our ERP data clean enough?
Rarely at first: 5 to 10% of lines contain errors (untracked returns, merged item codes). Cleaning is part of the project and takes 4 to 6 weeks.
Let's scope your project. We define with you the product families to model, the ERP connections and a go-live schedule measured in weeks. 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.

