The 4 Golden Rules for Choosing an OMS That Boosts Your Sales Starting in the First Month
In a retail world where every second counts, choosing an Order Management System (OMS) is no longer just a technological decision, but a true strategic choice. After helping dozens of retailers with their digital transformation, I’ve come to realize one undeniable truth: an ill-suited OMS can undermine even the most brilliant omnichannel strategy. Conversely, the right order management system quickly becomes the hidden engine of your growth.
This article provides you with essential tips for choosing the right e-commerce OMS, based on my hands-on experience and feedback from our clients. You’ll learn why the OMS has become so crucial, which criteria to prioritize in your selection, and how to avoid the costly pitfalls that slow down so many retail projects.
Why the WHO Has Become the Heart of Omnichannel E-Commerce
Soaring Customer Expectations: Express Delivery, Real-Time Inventory, Seamless Experience
Let’s be honest: your customers have become ruthless. The pandemic has accelerated trends that were already well established, turning “nice-to-haves” into “must-haves.” I recently spoke with the chief digital officer of a fashion retailer, who told me:
“In the past, offering 48-hour delivery was a competitive advantage. Today, it’s the bare minimum.”
The numbers speak for themselves. According to a Statista study, by 2025, 78% of consumers will abandon their shopping carts if the delivery promise is unclear or too slow. Even more striking, 67% of customers check in-store availability before even heading to the store (McKinsey, 2023). A 2024 Forrester study confirms this trend: 72% of shoppers consider transparency regarding inventory to be an essential trust factor.
This reality creates a new requirement: inventory information must be 100% reliable, updated in real time, and accessible through all channels.
- A customer who reserves a product online for in-store pickup will not accept it being out of stock once they arrive at the store.
- Trust and loyalty crumble at the first disappointment.
- I've seen retailers lose up to 15% of their loyal customers due to inventory synchronization errors.
That's where the WHO comes in: it becomes the single source of truth for your entire business ecosystem.
The WHO: Leading the Way in Customer Experience and Profitability
WHO goes far beyond simply providing visibility into inventory. It acts as the true orchestrator, harmonizing your entire retail value chain. Here’s a telling example:
A home decor retailer, with locations in 120 cities across France, was experiencing stockouts and high logistics costs, as each store managed its orders in isolation. After implementing a high-performance OMS:
- 32% fewer out-of-stock situations perceived by customers
- Stores transformed into mini-logistics hubs
- 25% savings on logistics costs through workflow optimization
ROI in just three months thanks solely to logistics—not even counting the increase in sales.
The OMS is therefore no longer just a technical tool. It acts as the central nervous system: it connects your sales strategy to day-to-day operations and turns an omnichannel vision… into an operational reality.
The 4 Essential Criteria for Choosing an OMS That's Truly Right for Your Business
Scalability, sovereignty, and interoperability: the three pillars of a sustainable HMS
Focusing solely on short-term features is a mistake many retailers make. To avoid unpleasant surprises, prioritize these three technical pillars:
- Scalability: Your OMS must be able to handle 100 orders a day just as easily as 10,000. Think about seasonal peaks—like Black Friday, when everything speeds up. Some have experienced critical system failures, sometimes resulting in instant six-figure losses. A robust and resilient system is essential.
- Data sovereignty: An EMS hosted outside the EU can quickly become a legal and operational headache. Between the GDPR, evolving European legislation, and geopolitical tensions, make sure your data is protected—and under your control.
- Interoperability: Your OMS must integrate with your existing tools (ERP, CRM, WMS, POS, etc.). If you’re asked to replace everything, it’s not the right OMS. Look for solutions that are scalable, modular, and adaptable.
Smart Orchestration: Prioritize Inventory, Optimize Flow, Satisfy the Customer
What sets a basic OMS apart from a growth accelerator is its ability to orchestrate processes intelligently. This means:
- Define business rules aligned with your strategy: Where should the order be shipped from?
- Ability to choose between the nearest store, excess inventory, a warehouse, a dropshipping partner, etc.
- Prioritize your performance and your goals (fast delivery, clearing out end-of-season inventory, reducing markdowns, etc.)
Please note: Many OMS systems promise this flexibility, but in reality impose rigid workflows. A good OMS adapts to your rules and evolves with your needs, without incurring exorbitant costs for each adjustment.
Key takeaway: An OMS isn't there to impose a specific technical approach on you; it should serve as the driving force behind YOUR retail vision.
Why French retailers trust Wishibam for their OMS
A comprehensive solution designed to address the challenges of the European retail industry
The European retail sector—and the French retail sector in particular—is unique in terms of its regulatory complexity and requirements. Many American and Asian OMS platforms are ill-suited to these realities. Wishibam offers a different approach:
- OMS was designed from the outset for the European market
- Data Hosting and Processing in France (Full GDPR Compliance)
- Local, responsive technical support that truly puts us close to our customers
- Proven agility: AGEC regulations were implemented quickly, at no additional cost, and without administrative burdens
“With our previous U.S. provider, every regulatory adaptation was a three-month project. With Wishibam, it’s often deployed before we’ve even finalized our internal specifications.”
— CIO of a ready-to-wear clothing retailer
Tangible results: 30% increase in omnichannel conversion rate, 25% decrease in logistics costs
The Wishibam promise is quickly measurable results:
Example: Maison Brémond 1830:
- +34% increase in web conversion rate
- -28% reduction in logistics costs
- -40% reduction in out-of-stock situations as perceived by the customer
Example: Jules— 65% of online orders are prepared in-store, resulting in delivery times that are twice as fast and a carbon footprint reduced by the same amount.
These results are evident as early as the first month, thanks to a phased implementation approach that prioritizes value creation, without unnecessary delays or never-ending projects.
“Our clients see the first results in as little as 4 to 6 weeks, not in 6 or 12 months.”
— The Wishibam Team
Don’t let OMS become the weak link in your growth! Choose a solution designed for retailers by French retail experts. Contact Wishibam today to transform your omnichannel performance in less than 30 days.
FAQ: Tips for Choosing the Right E-commerce CMS
What is the difference between an OMS and a WMS?
An OMS (Order Management System) coordinates the entire order lifecycle, from order entry to delivery, by managing inventory visibility across all channels. A WMS (Warehouse Management System) focuses solely on the operational management of warehouses. The OMS is cross-functional and strategic, while the WMS is operational and limited to warehouses.
How long does it take to implement an e-commerce OMS?
The implementation timeline generally ranges from 6 weeks to 6 months, depending on the complexity of your ecosystem and the number of integrations required. With Wishibam, our clients see initial results within 4 to 6 weeks thanks to our modular approach, which allows us to deploy critical features first.
What are the hidden costs to watch out for when choosing an OMS?
Be wary of integration fees with no upper limit, maintenance costs that increase over time, per-transaction fees that skyrocket as your business grows, and custom developments billed as extra. Opt for a transparent model with predictable costs that includes regulatory changes and functional updates.
How do you measure the ROI of an e-commerce OMS?
The ROI of an OMS is primarily measured across three areas: increased conversion rates (reliability of inventory and delivery information), reduced logistics costs, and improved customer satisfaction (as measured by the NPS). Our customers typically see a positive ROI in less than 3 months.
Can an OMS operate without replacing my existing systems?
Absolutely. A good OMS should integrate into your existing ecosystem without requiring a complete replacement. At Wishibam, our OMS interfaces with more than 50 different solutions (ERP, CRM, WMS, PIM, etc.) via standard connectors or APIs. The goal is to enhance your infrastructure, not replace it.
How does the WHO contribute to an effective omnichannel strategy?
The OMS is the backbone of any successful omnichannel strategy because it provides a unified view of inventory and orders across all channels. It enables retailers to offer services such as click-and-collect, ship-from-store, and in-store returns, while optimizing inventory allocation. Without a high-performing OMS, omnichannel retailing often remains nothing more than a marketing promise with no operational reality.