Fashion Inventory Management Software

Why fashion inventory is different from general inventory

Every style ships in a size run, each size run runs across multiple colours, and each colour-size combination is a distinct stock position. A brand with 50 styles, 4 colours, and 8 sizes has 1,600 stock positions per season, before multi-location complexity. Generic inventory tools aggregate at the product level and the numbers drift. A fashion-specific system models the hierarchy, style, colour, size, location, season, and keeps every position accurate after every sale, receipt, transfer, and markdown.

  • Size run inventory tracking across colours, collections, and locations

  • Purchase order management with supplier lead time monitoring

  • Sample and development tracking from concept to production

  • Sell-through and markdown analytics by style, size, and channel

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The problem

Sound familiar?

  • Tracking stock across size runs, colours, and multiple warehouse locations in a spreadsheet that breaks every time a new season launches?

  • Purchase orders with suppliers managed in email, so production delays only become visible when items fail to arrive?

Short answer

RaftLabs builds custom inventory management software for fashion brands covering size run tracking across colours, collections, and seasons, purchase order management with supplier lead time monitoring, sample and development tracking, warehouse management, and sell-through and markdown analytics. A custom system is the right choice when off-the-shelf platforms cannot model your size run hierarchy or handle the season and collection complexity your buying team works with. Most fashion inventory projects deliver in 10 to 14 weeks at a fixed cost.

Key takeaways

  • Open-to-buy calculations use current stock, confirmed inbound orders, and the season sales plan to generate size-run-level reorder recommendations automatically.
  • Purchase orders are tied to size runs and supplier lead times, with alerts firing when a shipment runs late, while there's still time to act, not after goods fail to arrive.
  • Sell-through and markdown candidate reporting rank styles by inventory value at risk, turning markdown timing into a calculation rather than a gut call.
  • A full system (size run tracking, POs, suppliers, samples, warehouse, analytics) runs $25,000-$70,000; a focused build covering size run tracking and POs runs $12,000-$35,000.

Trusted by

Vodafone logo
Aldi logo
Nike logo
Microsoft logo
Heineken logo
Cisco logo
Calorgas logo
Energia Rewards logo

Fashion inventory delivery, by the numbers

software products shipped
100+
cost delivery
Fixed
week delivery cycles
10-14
industries served
24+

Why fashion inventory is different from general inventory

A fashion-specific system models the hierarchy correctly from the start, so every downstream report, sell-through, open-to-buy, markdown candidates, is only as accurate as the underlying stock model, and the model is right.

Capabilities

What we build

  • 01
    Size run inventory management

    Stock tracked at colour-size-location level, updated in real time after every sale and transfer, with open-to-buy calculations showing what remains to be bought against the season plan.

  • 02
    Purchase order and supplier management

    PO creation at the size run level with automatic size breakdowns, delivery tracking against confirmed lead times, and alerts before a shipment runs late.

  • 03
    Sample and development tracking

    Sample requests track through fit, salesman, and production approval stages, with PLM integration pulling specs directly and season calendar visibility against range-plan deadlines.

    Built with
    Centric PLM · Lectra
  • 04
    Warehouse and fulfilment management

    Multi-location stock positions update in real time, with pick-pack-despatch workflows for wholesale, retail, and e-commerce fulfilment from the same inventory pool.

  • 05
    Sell-through and markdown analytics

    Sell-through rate by style, size, and channel feeds markdown candidate reporting ranked by inventory value at risk, with margin-impact modelling per price reduction.

  • 06
    Season and collection planning

    Range plan budgets track against committed spend as POs are raised, with hindsight reporting at season close comparing planned versus actual sell-through.

How we work

From scope to live inventory system

  1. Week 1
    01

    Season and hierarchy scoping

    We map your size run structure, season complexity, and current systems. You leave week 1 with a written scope document and a fixed-price quote.

  2. Weeks 2-4
    02

    Data model and PO workflow design

    Size run hierarchy and purchase order logic designed against your actual buying process.

  3. Weeks 5-11
    03

    Build and integrate

    Inventory tracking, PO management, and analytics built in parallel, tested against real season data.

  4. Final 2-3 weeks
    04

    Launch and buying team training

    Buying and warehouse teams trained on the workflow before full rollout.

Why us

Why fashion brands choose RaftLabs

  • 01
    Senior engineers build what they scope

    The engineers who assess your season complexity also build the solution. No bait-and-switch, no offshore handoff after the contract is signed.

  • 02
    Fixed price before development starts

    We scope the work, calculate the cost, and lock it in writing before any development starts.

  • 03
    9 years and 100+ products shipped

    Clients include Vodafone, T-Mobile, Aldi, Nike, Cisco, and Lockheed Martin. Track record building inventory and ERP platforms.

  • 04
    Modelled for fashion, not adapted to it

    Style, colour, size, location, and season are first-class data dimensions, not bolted-on variants.

  • 05
    Markdown decisions built on data

    Sell-through and margin impact modelling replace gut-feel timing.

Have a fashion inventory project?

Tell us your season complexity, size run structure, current system, and where your buying team loses the most time. We will scope the right system and give you a fixed cost.

Talk about your fashion inventory project

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Frequently asked questions

Generic systems track quantity at the product level. Fashion requires tracking at the colour-size-location level, a fundamentally different data model, a brand with 50 styles, 4 colours, and 8 sizes has 1,600 distinct stock positions per season. Generic platforms flatten this or bolt on variants in a way that becomes unusable at scale.

Yes. The system calculates net remaining open-to-buy by style and size from current stock, confirmed inbound orders, and the season sales plan, generating reorder recommendations at the size run level with preferred supplier, MOQ, and needed delivery date.

Yes. We integrate with 3PL WMS systems via API where supported and scheduled data exchange where not, so stock positions across every location reflect in real or near real time, with inbound bookings and returns reconciled automatically.

A full system covering size run tracking, purchase orders, supplier management, sample tracking, warehouse management, and sell-through analytics typically costs $25,000 to $70,000. A more focused build covering size run tracking and purchase order management typically runs $12,000 to $35,000.

Work with us

Tell us what you need. We'll tell you what it would take.

We scope Fashion Inventory Management Software Development in 30 minutes. You walk away with a clear cost, timeline, and approach. No commitment required.

  • Scope and cost agreed before work starts. No surprises. No obligation.
  • Working prototype within 3 weeks of kickoff.
  • Pay by milestone. You see progress before each invoice.
  • 60-day post-launch warranty. Bug fixes, UI tweaks, and deployment support. No retainer.
  • All conversations are NDA-protected.

Go deeper

Browse our case studies

Fashion software by area