As long as you sell through a single store, an order is simple: it comes in, reserves stock, goes to shipping. The trouble starts when you add a marketplace, a mobile app, B2B sales and a physical store. Suddenly the same order looks different in every system, and product availability stops being one number. For an operations or fulfilment director that means overselling, late shipments and a support team that guesses what actually happened.
In our experience, the hard part in these projects is not adding another channel but building one coherent layer that knows everything about every order and can steer it. Even where we don’t bring an off-the-shelf box, we fill the roles and combine the skills needed for an order management system to be built and run in production, without standing up a team from scratch.
Why do orders drift apart across channels?
Because each channel has its own data model, its own pace and its own truth about stock. The store removes an item at the basket stage, the marketplace syncs every few minutes, and the ERP only posts after payment. Those delays stack up and the same unit can be sold twice.
On top of that, different statuses (“paid”, “in progress”, “packed”) are named differently in every tool, returns travel a different path than shipments, and manual corrections live in spreadsheets. Without a shared language for the order, each team works off a different picture of reality, and the gaps only surface during a complaint.
What is omnichannel order orchestration and routing to warehouses?
Order orchestration is the heart of an OMS: the layer that takes an order from any channel, reduces it to one format and decides how to fulfil it. This is where an order stops belonging to a channel and starts belonging to the company.
The key piece is the routing logic - the answer to “where do we ship this from”. We design rules that weigh:
- availability across individual warehouses and stores,
- distance and shipping cost to the customer,
- priorities (e.g. clearing a seasonal warehouse, a B2B customer’s SLA),
- the fulfilment capacity of a given location on a given day.
Well-shaped routing can also split a single order across several sources when no one location holds everything, and do it so the customer gets as few parcels as possible at an acceptable cost.
How do you synchronise stock and availability across channels?
This is the question most rollouts fall over. Instead of keeping separate stock per channel, we build one source of truth for availability and feed every sales point from it. The OMS sits between the warehouse and the channels, so everyone sees a consistent number.
In practice we use mechanisms that guard against overselling and “phantom” stock:
- reservations and soft locks on goods while an order is being fulfilled,
- available-to-promise (ATP), which counts not just stock on hand but goods in transit,
- safety buffers for channels with slower synchronisation,
- event-driven updates instead of a heavy nightly recalculation.
How do you handle split shipments and backorders?
A whole order rarely travels in one parcel from one place. Real e-commerce has to cope when part of the order is available now and part has to be sourced. We model the order so that line items can live their own cycle - some packed and shipped today, others on backorder with an expected delivery date.
That brings concrete product and technical decisions: how to tell the customer about a partial shipment, when to capture payment, how to account for delivery when there are several parcels, and what to do when a backorder never closes. We design these rules together with the operations team, because they, not the code alone, decide the customer experience.
What customer-service tools do you need for orders?
Even the best routing won’t help if the agent can’t see what’s happening with an order. That’s why part of an OMS is a tooling layer for support and operations - a panel where one order has one full picture.
We build the features that are actually used on a call with a customer:
- the full order history (statuses, payments, shipments, returns) in one place,
- remedial actions: fixing an address, cancelling a line, re-shipping,
- a view of reservations and the fulfilment source, to answer “where is my parcel”,
- returns and complaints handling tied to the same order.
How do you wire up integrations with ERP, WMS and payments?
An OMS doesn’t live in a vacuum - its value comes from talking to the rest of the system landscape. We treat it as an integration layer that translates the order between the world of sales and the world of fulfilment and finance.
Typically we connect it with:
- ERP - for products, prices, invoices and posting,
- WMS - for picking, packing and warehouse movements,
- payment gateways - authorisations, captures, refunds,
- carriers - labels, tracking, delivery statuses.
We design these integrations to be resilient to the other side’s failures: with queues, retries and clear behaviour when the ERP or WMS stops responding for a while. That way one system’s outage doesn’t halt the whole order flow.
How do you ensure order reliability and consistency?
An order is money and a promise to the customer, so an OMS has to be consistent and idempotent - the same message processed twice must not create a second shipment or a second capture. We lean on an event-driven architecture where each step has an unambiguous state and the change history is replayable.
In practice that means designing for edge cases: duplicated marketplace webhooks, a payment that confirms late, or a warehouse reporting a shortage after the stock was already reserved. We build reconciliation mechanisms and monitoring that catch drift before the customer does. This is the layer that decides whether the system holds during a sales peak or breeds chaos.
Which skills do we provide for an OMS project?
We shape the team around the specific nature of order management, not “just in case”. On projects like these we co-build the team from the roles that actually close the topic:
- an architect / backend developer designing the order model and orchestration logic,
- integration engineers who know the realities of ERP, WMS, payments and carrier APIs,
- a data and consistency specialist minding stock, reservations and reconciliation,
- a DevOps specialist building deployments, queues and monitoring for peak traffic.
We draw on real experience in e-commerce projects and transactional systems, where volume and data correctness are what matter.
How do we do it at RITS?
We work as a nearshore partner from Poland that reinforces your team with the skills needed to build and run an OMS. Rather than selling a box, we step into your system landscape and design the order layer around your channels and processes.
- we fill roles from architecture through integrations to DevOps, matched to the project scope,
- we verify skills before the start, and our recruitment usually closes in about three weeks,
- as a partner in a close time zone we join your code reviews and meetings without a long ramp-up,
- we work in whichever model fits best: custom software built by our team, or team augmentation when skills need topping up fast.
Where to start with an order management system?
Start from the single most painful flow - usually overselling or a stock mismatch between the store and a marketplace. Describe how an order lives today, from arrival to shipment, and where you lose consistency. That shows whether you need a full OMS or, first, just orchestration and stock synchronisation.
Choosing the engagement model matters here as much as the technology. We covered the differences between team augmentation, a dedicated team and managed services in our article on IT engagement models.
Fighting with orders across channels? Let’s talk - we’ll match a team and an OMS architecture to your e-commerce.