Order Entry System: What It Is and How to Choose One | OrderSync Blog

If you manage B2B order intake, you are either using an order entry system or you are your order entry system. Someone on your team is reading emails, pulling PDFs out of attachments, and keying line items into your ERP by hand. That is order entry — it is just the manual version.

A dedicated order entry system automates that process. It receives the order, reads it in whatever format the buyer used, validates the data, and writes a confirmed sales order to your ERP without a person in the loop.

Here is what you need to know before you choose one.

What an Order Entry System Actually Does

The core job of any order entry system is the same: take an inbound purchase order from a buyer and turn it into a sales order in your ERP.

That sounds simple until you consider the formats buyers actually use:

• EDI (Electronic Data Interchange): large retailers and distributors transmit orders as structured X12 files (EDI 850) through a VAN or direct AS2 connection. The format is rigid and machine-readable.
• PDF attachments: most small and mid-size buyers email a PDF. Sometimes it is a clean form. Sometimes it is a scanned handwritten PO.
• Email body text: some buyers type their orders directly into the email message. "Can we get 3 cases of item #47882 and 2 of #44113?"
• CSV or Excel: buyers on portals, procurement systems, or ERP exports send spreadsheets with line items.
• Fax: still common in food distribution, some manufacturing, and healthcare supply chains.

An order entry system that only handles EDI leaves everything else on your desk. An order entry system that only handles PDF and email leaves your EDI trading partners unserved. The format question is the first thing to get right.

Beyond receiving and reading the order, a good system also:

• Validates the order against your product catalog (is the SKU real?), pricing rules (is the price the customer agreed to?), and inventory (do you have it?)
• Flags exceptions so a human can review orders that do not pass validation without holding up the clean ones
• Routes the order to the right ERP as a confirmed sales order, eliminating re-keying

The ASC X12 standard governs EDI transaction sets used in North American retail supply chains. The GS1 US governs the product identifiers (GTINs, UPCs) that flow inside those transactions. Both are authoritative references if you are implementing EDI for the first time.

Three Types of Order Entry Systems

1. EDI VANs (Value-Added Networks)

EDI VANs like SPS Commerce and TrueCommerce are the traditional answer for retail suppliers. They connect your business to a network of pre-integrated trading partners — retailers, distributors, and logistics providers who all speak EDI. You send and receive structured X12 transactions: 850 purchase orders in, 856 ship notices and 810 invoices out.

EDI VANs work well when your entire customer base is EDI-capable. They do not process PDF, email, or fax orders. Buyers who are not on the EDI network cannot transact with you through a VAN.

Pricing is typically per-trading-partner, which means your costs scale linearly as you add new connections.

2. Document Automation Platforms

Document automation platforms like Conexiom focus specifically on converting email attachments and PDF purchase orders into ERP sales orders. They use machine learning to read the document, extract the line items, and write the data to your system. No manual re-entry.

These platforms are well-suited to industrial distributors whose customers send high volumes of PDF orders from a stable set of buyers. Once a sender is trained, accuracy is high. The limitation: they do not operate full EDI VANs. If a retailer requires you to transmit EDI 856 advance ship notices or EDI 810 invoices, you need a separate system for that.

3. Multi-Format Order Automation Platforms

Multi-format platforms handle every inbound order channel in one system: EDI, PDF, email, CSV, and fax. The AI reads whatever the buyer sends without a per-sender setup queue. The platform runs full EDI transaction sets (850, 855, 856, 810, 997) and AI extraction for unstructured documents through the same pipeline.

This is the most flexible architecture for distributors with mixed buyer bases — some large retailers sending EDI, and a long tail of smaller customers sending orders by email or PDF.

OrderSync is built on this model: one platform for every inbound order format, with direct ERP sync.

What to Look For in an Order Entry System

Format coverage first

Before anything else, list how your buyers actually send orders. For most B2B distributors, the breakdown looks something like:

• 20–40% EDI (large retail or wholesale customers)
• 40–60% email with PDF or spreadsheet attachments
• 10–20% email body text or fax

A system that covers only one of those categories leaves the rest on the table.

ERP compatibility

Your order entry system needs to write confirmed sales orders to your ERP. The integration method matters:

• Pre-built connectors: the vendor has already built a direct integration to your ERP (NetSuite, QuickBooks, Dynamics 365, SAP, Acumatica, etc.). Setup is faster.
• API integration: the platform exposes an API that your ERP can connect to, or vice versa. Requires developer work.
• CSV/file-based: the platform exports a file that you import into your ERP. Manual step required.

Pre-built connectors or API integration are the right targets. CSV exports eliminate the manual re-keying step but still require a person to trigger the import.

Validation rules

Order entry without validation is order entry with deferred errors. An order that enters your ERP with the wrong SKU, wrong price, or wrong quantity creates a fulfillment problem downstream — and often a chargeback from the customer.

Good validation catches:

• Unknown SKUs or items not in your catalog
• Prices that do not match the customer's agreed pricing
• Quantities below minimum order quantities
• Ship-to addresses that do not match your records
• Items that are out of stock or discontinued

Validation errors should go into an exceptions queue, not silently through to your ERP.

Implementation time

The difference between "live in 2 weeks" and "live in 6 months" is real. Legacy EDI VANs and enterprise document automation platforms have long onboarding queues: mapping teams, testing cycles, and certification processes for each trading partner.

Modern platforms — especially multi-format systems with AI extraction — can bring new trading partners live in days. No mapping queue. New PDF sender comes in, the system reads it.

Pricing model

Per-transaction pricing (paying per order, per document, or per trading partner) creates unpredictable costs as volume grows. Flat monthly pricing is more predictable for budgeting. The ideal is a small monthly base plus a low per-order fee with no per-partner cap.

Order Entry System vs Order Management System

The terms get conflated. Here is the distinction:

Order entry system: receives and processes inbound purchase orders. Front of the pipe.

Order management system (OMS): manages orders across their full lifecycle — tracking, fulfillment, shipping, inventory allocation, returns. Mid-to-back of the pipe.

Many platforms do both. But if your primary problem is getting orders out of email attachments and into your ERP accurately, you are looking for an order entry system. The broader OMS features are secondary.

For a detailed breakdown of what OMS platforms cover, see order processing systems and the order management guide.

Who Uses Order Entry Systems

The operations manager who spends 3 hours a day re-keying orders is the primary user. So is the team that runs 100+ orders a day and loses one to a typo every week. The use cases span:

Food and seafood distributors — receive orders from restaurants, grocery chains, and institutions via email, fax, and EDI. Mixed format is the norm. Catch-weight pricing and UOM variations add complexity that needs validation.

Industrial distributors — large customers (Grainger-style) send EDI 850s. Regional customers send email. A good system handles both without a separate stack.

Wholesale distributors — many small buyers who each have a slightly different PO format. AI extraction that adapts to new senders without a template queue is the right tool here.

Retail suppliers — primarily EDI-only, but the long tail of specialty retailers still sends PDFs. Needing a VAN plus a document tool is friction that multi-format platforms eliminate.

For distributors specifically, see order entry systems for distributors.

Common Mistakes When Choosing an Order Entry System

Underestimating format diversity: "We mostly get EDI" usually means 60–70% EDI and the rest comes in however. That 30–40% matters.

Choosing for today's volume, not next year's: per-transaction pricing that looks fine at 100 orders per day becomes expensive at 500.

Skipping the ERP compatibility check: a platform that cannot integrate with your specific ERP version creates a paper-ERP gap that a person has to close.

Ignoring implementation time: a 6-month implementation to handle orders that are piling up today is not acceptable. Ask for a live-in-weeks commitment.

Not testing with your own documents: any vendor can demo clean, well-formatted PDFs. Bring your actual worst-case documents — the scanned faxes, the handwritten POs, the spreadsheets with inconsistent column names — and see what the system does with them.

The free EDI Inspector is useful before you start any EDI-related evaluation: parse your own EDI files to see exactly what transaction sets your trading partners are sending and what you will need to handle.

Order Entry System Comparison: Key Dimensions

Dimension	EDI VAN	Document Automation	Multi-Format Platform
EDI (850, 810, 856, 997)	Full round-trip	850 input only	Full round-trip
PDF/email orders	Not supported	Core capability	Core capability
Fax orders	Not supported	Limited	Supported
AI extraction	Not applicable	Yes, template-based	Yes, no templates
ERP connectors	Broad (pre-built)	Enterprise ERPs	Growing
Trading partner network	Large (pre-built)	Not applicable	Not applicable
Implementation time	4-12 weeks	Weeks to months	Days to weeks
Pricing model	Per partner/transaction	Per partner/year	Monthly flat + per order
Best for	Retail supplier, all-EDI buyers	Industrial distribution, high PDF volume	Mixed-format buyer base

Getting Started

If you are evaluating order entry systems, the first step is a simple audit:

1. Pull your last 90 days of inbound orders
2. Sort by how they arrived: EDI, email-PDF, email body, fax, CSV, other
3. Note the format breakdown as a percentage
4. Check your ERP — which version, which connector options exist

That data determines which type of system actually fits. A distributor with 90% EDI volume has different needs than one with 90% email-PDF volume.

For a deeper look at how AI-powered extraction compares to traditional EDI processing, see AI order agent vs EDI. For the full landscape of order automation options, the best order automation software guide covers the category.

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FAQ

What is an order entry system? An order entry system receives purchase orders from buyers in any format (EDI, PDF, email, fax), extracts the order data, validates it against your catalog and pricing, and creates a sales order in your ERP without manual re-entry.

How is an order entry system different from an order management system? An order entry system handles the front of the pipe: receiving and processing inbound purchase orders. An order management system manages orders across their full lifecycle including fulfillment, shipping, inventory, and returns. Many platforms do both, but they are different problems.

What formats should a B2B order entry system handle? For most B2B distributors, the relevant formats are EDI (X12 850), PDF attachments, email body text, CSV/Excel spreadsheets, and sometimes fax. A system that covers all of these handles your full inbound order volume. A system that covers only EDI leaves email orders on the table.

How long does order entry system implementation take? Legacy EDI VANs and enterprise document platforms take 4 to 12+ weeks. Modern multi-format platforms with AI extraction go live in 2 to 4 weeks. The difference is whether each new trading partner requires a manual template setup cycle.

What ERPs do order entry systems integrate with? The most commonly supported ERPs are NetSuite, QuickBooks, Microsoft Dynamics 365, SAP Business One, Sage, Acumatica, Epicor, and Infor. Check that your specific ERP version is on the supported list before committing.