GrayCyan — AI for Regulated Manufacturers
WMS for Manufacturing

WMS for Manufacturing: Inventory Management Built on Your Existing ERP

Connected to both modules: inventory and production.

GrayCyan builds custom manufacturing inventory management connected to the ERP you already run, reading production orders, BOM data and inventory from it, and writing warehouse transactions back automatically.

Book a Discovery Call→
As featured in
KETKFeatured ›
Unite.AIFeatured ›
PwCClient
Small Business CurrentsFeatured ›
The Manufacturing ConnectionFeatured ›
Selling in the Age of AIFeatured ›
IngramPartner
Georgia Manufacturing AllianceMember
The Tech OutlookFeatured ›
ForbesFeatured ›
IT BrewFeatured ›
BetaNewsFeatured ›
IENFeatured ›
No JitterFeatured ›
AIJournFeatured ›
Authority MagazineFeatured ›
MBT MagFeatured ›
Manufacturing DiveFeatured ›
EntrepreneurFeatured ›
BenzingaFeatured ›
The Core Difference

Why Warehouse Management for Manufacturing Is Different From Warehouse Management for Distribution

A warehouse management system built for distribution tracks sales orders. Items arrive from suppliers, orders leave for customers. A warehouse management system for manufacturing has to track production orders too: raw materials come in and get consumed by production, work in process moves between the floor and staging areas, and finished goods arrive from production before they ever reach a customer. That difference is not a configuration setting. It requires a different integration architecture.

01

Raw Material Receiving Against Production Orders

Incoming materials get received against a purchase order and allocated to the production order that will consume them, so the scheduler knows what is actually available before releasing work orders.

02

Production Picking Against Work Orders

Components move from raw material storage to the production floor against open work orders, not sales orders. This means the system has to read bill of materials requirements directly from the production module.

03

WIP Location Tracking

Partially completed assemblies move between staging areas, production lines, and quality holds. The system has to track these locations without mixing WIP with finished goods.

04

Finished Goods Receiving From Production

When a run completes, the WMS receives finished goods into the warehouse from production, updates ERP inventory and triggers quality inspection if required.

05

Lot Traceability Through Every Checkpoint

FSMA 204 and USDA rules require lot numbers and key data elements captured at receiving, production and shipping. The WMS is the system of record at each point.

06

ERP Production Module Integration

The WMS has to read from and write to both the inventory module and the production module. It is a connection most off the shelf platforms do not natively support on mid market ERPs like Epicor, Fishbowl or Acumatica.

Most generic WMS platforms are built for distribution. They connect fine to sales orders and purchase orders. They cannot natively connect to production orders, BOM requirements, or WIP location logic. For mid market manufacturers, that gap is where manufacturing inventory management breaks down.

What We Build

Manufacturing Inventory Management Connected to Your ERP

GrayCyan does not sell a standalone WMS platform. GrayCyan builds a custom manufacturing inventory management system connected to the ERP a manufacturer already runs, reading production orders, BOM data, and inventory from it and writing warehouse transactions back to both the inventory and production modules automatically.

Purchase order receipts scanned at the dock and allocated to production orders
Raw Material

Raw Material Management

Purchase order receipts scanned at the dock, verified against the ERP purchase order and allocated to the production order that needs them, with inventory updated in real time.

Raw material inventory tracked by lot, location and supplier, with a full backward trace to source supplier and purchase order.

Reorder point alerts tied to the production schedule, triggering on upcoming BOM requirements rather than current stock level alone.

Component issues scanned against work orders with BOM read from the ERP
Production & WIP

Production Order Picking and WIP Tracking

Component issues against work orders scanned from raw material storage to production staging, with BOM requirements read straight from the ERP production module and no manual pick list entry.

WIP tracked in named locations, visible to production schedulers in real time, so sub assemblies and partially completed work never disappear into a black box.

WIP to finished goods conversion in a single scan event, moving inventory from WIP to finished goods and notifying the ERP production order of completion.

Finished goods received from production with lot assignment and quality hold routing
Finished Goods

Finished Goods Warehouse Management

Finished goods receiving from production: scan based receipt into a warehouse location, lot assignment, and quality hold routing if required.

Outbound picking against sales orders, configured as wave, zone or discrete picking to match the operation's order volume and layout.

Lot traceability through shipping, with lot numbers and key data elements captured at pack and ship and FSMA 204 records generated automatically.

Model reading the production schedule to flag reorder needs before a run
AI Features

Manufacturing Inventory Management AI

Demand driven raw material reorder: a model reads the production schedule and consumption history to flag reorder needs before they threaten a run.

Inventory anomaly detection: continuous monitoring flags unexpected decreases, receiving variances, and BOM consumption deviations before a physical count would catch them.

Finished goods forecasting: production schedule and order history combined to optimize storage location and picking sequence.

Both Modules

ERP Integration for Manufacturing Inventory Management

The real difference between a WMS for manufacturing and a WMS for distribution is which ERP modules it talks to. Distribution WMS connects to inventory and order management.

Manufacturing WMS also has to connect to production management, reading BOM requirements, work order status and production completion events.

ERP integration points:

  • Purchase orders: incoming receipts scanned and posted to the ERP purchase order automatically, no manual entry.
  • Sales orders: outbound picks confirmed against the ERP sales order, with inventory decremented and COGS posted at ship confirmation.
  • Production orders and work orders: component issues scanned against the ERP work order, decrementing raw material and debiting the WIP account.
  • Bill of materials: component requirements read from the ERP BOM at work order release, so the WMS generates a picking list from real BOM data instead of manual transcription.
  • Finished goods production receipts: a completed production scan creates an ERP goods receipt, moves inventory from WIP to finished goods and closes production order components.
  • Inventory valuation: every scan event posts ERP accounting entries automatically, no end of day reconciliation.

Every integration GrayCyan builds is fully owned by the manufacturer at engagement completion. No recurring middleware licensing fees and no dependency on GrayCyan to run it after go live. See how this same integration approach applies more broadly in ERP AI automation.

ERPs GrayCyan has integrated with
NetSuiteManufacturing module, work orders, lot tracking, inventory, order management
SAPBusiness One and S/4HANA: production orders, batch management, goods movements, WM module
EpicorKinetic: job costing, manufacturing orders, component issues, shipping
AcumaticaManufacturing module, production orders, lot and serial tracking
FishbowlManufacturing orders, BOM, inventory, lot tracking
OdooManufacturing module, work orders, stock moves
Microsoft Dynamics 365Manufacturing module, production orders, inventory management
InforCloudSuite Industrial, SyteLine: production management, inventory control
Let's
Talk

Does your WMS talk to your production module?

Most do not. Tell us which ERP you run and where receiving, picking or WIP tracking is still manual.

Book a Discovery Call→
Client Results

Manufacturing Inventory Management in Practice: GrayCyan Deployments

Across Fishbowl manufacturing orders, USDA-regulated food processing, and ITAR-controlled defense operations. No ERP replaced in any of them.

Fishbowl manufacturing orders connected to scan based inventory management
Receiving & Picking
0%
Less Manual Data Entry

Fishbowl ERP, Distribution Manufacturer

A manufacturer running Fishbowl for manufacturing orders and inventory was losing about 12 hours a day to manual data entry bridging receiving, production picking and inventory reconciliation across disconnected systems.

GrayCyan built API middleware connecting Fishbowl manufacturing orders to scan based inventory management: receipts post to purchase orders and production allocations automatically, component issues scan against work orders and finished goods receipts trigger production order completion.

Result: an 85 percent reduction in manual data entry, from 12 hours to under 2 hours daily, with full lot genealogy traceable in minutes.

FISHBOWL ERP
USDA regulated meat processor capturing key data elements at every checkpoint
Quality & Compliance
0 sec
Audit Response, Down From 2 to 3 Days

USDA-Regulated Meat Processor

This processor needed FSMA 204 compliant lot traceability built into receiving, production and shipping, not assembled by hand after the fact.

GrayCyan built a manufacturing WMS with key data element capture at every checkpoint, with USDA batch records and lethality evidence generated automatically during production.

Result: audit response time dropped from 2 to 3 days to under 60 seconds.

USDA REGULATED — CONFIDENTIAL
On premises manufacturing WMS and document intelligence in an air gapped facility
On-Premises
0 yrs
Of Part Numbers, BOMs and Drawings Searchable

Air-Gapped Defense Manufacturer

ITAR requirements ruled out cloud based systems but the operation still needed full manufacturing inventory management and engineering document retrieval on its existing infrastructure.

GrayCyan built an on premises manufacturing WMS and document intelligence system, making 40 years of part numbers, BOMs and drawings searchable in seconds with no external data transmission.

Result: engineering and inventory lookup time dropped from 30 to 45 minutes to seconds, with zero data leaving the facility.

ITAR — CONFIDENTIAL
Right Fit

Who GrayCyan's Manufacturing Inventory Management System Is Right For

01

Mid Market Manufacturers

50 to 500 employees running an ERP with a production module that is not connected to warehouse inventory management.

02

Food, CPG and Processors

That need FSMA 204 compliant lot traceability built into warehouse and production workflows.

03

Non Standard ERPs

Epicor, Fishbowl, Acumatica or Odoo, where off the shelf WMS platforms have limited native integration.

04

Still Manual or on Spreadsheets

Operations where raw material receiving, production picking and WIP tracking run alongside the ERP by hand.

05

Manufacturers Who Want Ownership

Who want to own their inventory management system instead of paying recurring SaaS license fees.

Not the right fit:

  • Operations with no ERP or no production order history. A data foundation project comes first.
  • Pure distribution operations without a production module. See custom WMS development for distribution instead.
  • Operations looking for off the shelf SaaS inventory platforms. GrayCyan builds custom systems, not packaged software.

Frequently Asked Questions: WMS for Manufacturing

What is manufacturing inventory management?−
Manufacturing inventory management is the tracking and control of raw materials, work in process and finished goods across a manufacturing operation, connected to production orders, BOM requirements and ERP financial modules. Unlike distribution inventory management, it has to account for material consumption during production, WIP location tracking and finished goods receipts from production as well as from external suppliers.
What is the best inventory management software for manufacturing?+
It depends on the existing ERP and production module. Off the shelf platforms like NetSuite, Fishbowl and Epicor cover most standard requirements. Manufacturers on ERPs not natively supported by major WMS vendors, or who need production aware lot traceability, often get a better fit from a custom system connected to their existing ERP, without ongoing SaaS fees.
What is a WMS in manufacturing?+
A WMS in manufacturing controls the physical movement of inventory from raw material receiving through production picking, WIP staging, finished goods receipt and outbound shipping. Unlike a distribution WMS, which connects only to sales and purchase orders, a manufacturing WMS also integrates with the ERP production module, reading work order requirements and writing component issue and completion transactions.
How is manufacturing warehouse management different from distribution warehouse management?+
Distribution warehouse management tracks goods moving from suppliers to customers. Manufacturing warehouse management tracks goods moving from suppliers through production and then to customers, including raw material allocation to work orders, WIP location tracking and finished goods receipt from production. It requires integration with the ERP production module, not just inventory and order management.
Does manufacturing inventory management require a new ERP?+
No. GrayCyan builds manufacturing inventory management systems that connect to the ERP already running in the operation, reading work orders, BOM requirements and production schedules, and writing warehouse transactions back to both the inventory and production modules automatically. No ERP replacement and full ownership of what is built at completion.
What ERP systems does GrayCyan integrate manufacturing WMS with?+
GrayCyan has integrated manufacturing inventory management systems with NetSuite, SAP Business One and S/4HANA, Epicor Kinetic, Acumatica, Fishbowl, Odoo, Microsoft Dynamics 365, Infor CloudSuite Industrial and SyteLine, covering both the inventory module and the production management module.
How does manufacturing WMS support FSMA 204 compliance?+
FSMA 204 requires key data elements captured at every critical tracking event: receiving, production, and shipping. A manufacturing WMS that captures lot numbers and key data elements at each scan event generates the full traceability record needed for a 24 hour FDA response automatically, following the product from raw material supplier through every production stage to the customer shipment.
Can a manufacturing WMS work in an air gapped or regulated environment?+
Yes. GrayCyan deploys manufacturing inventory management systems fully on premises, with all WMS logic, ERP middleware and AI features running on facility owned hardware and no cloud dependency. This is required for ITAR controlled manufacturers and food processors with data sovereignty requirements that rule out cloud based SaaS platforms.
Let's
Talk

Ready to Connect Your Warehouse to Your Production Floor?

Tell GrayCyan which ERP you run, where your raw material receiving, production picking or WIP tracking is still manual, and what your compliance requirements are.

GrayCyan will show you what manufacturing inventory management built on your existing ERP looks like.

Book a Discovery Call→

Start with the AI Readiness Assessment or see custom WMS development for distribution focused operations →