Executives and logistics operations leaders are continuously evaluating warehouse automation technologies to improve throughput, reduce labor dependency, and increase order accuracy. However, achieving a strong return on automation requires more than adding equipment. It requires real-time orchestration across systems, people, and processes.
This is where a warehouse execution system (WES) plays a critical role. A WES connects ERP and WMS platforms to warehouse automation technologies, enabling real-time decision-making that improves order flow, labor utilization, and system-wide efficiency.
To maximize the ROI from warehouse automation, it’s important to understand the distinct roles of a warehouse execution system (WES) and a warehouse management system (WMS), especially considering most ERP systems claim to include core WMS functionality. While a WMS manages inventory and core warehouse processes, a WES focuses on real-time execution, prioritizing, releasing, and coordinating work across people, automation, and material handling systems as conditions change throughout the day. The key difference is execution: how work is prioritized, released, and managed in real time across a dynamic warehouse environment.
This guide explains how WES software integrates with ERP systems, orchestrates warehouse automation, and delivers measurable improvements in throughput, accuracy, and scalability for mid-market and enterprise distribution operations.
In this guide:
- The Value of Warehouse Execution Systems (WES vs WMS vs WCS)
- Best-Fit Warehouse Execution & Orchestration Software
- Top Warehouse Execution Systems That Integrate with ERP Software
- How a WES Enhances ERP & WMS Platforms
- WES/ERP/WMS Integration Paths
- Signs You’ve Outgrown ERP Warehouse Functionality & Need a WES
- How to Calculate WES ROI Beyond Labor Savings
- Warehouse Execution Systems That Scale from One to Multiple Sites
- WES Implementation Timeline & What to Expect
- Brownfield Integration with Existing Warehouse Software & Automation
- How WES Orchestrates People, AMRs, & Automation
- RDS Modules & Value-Add Features
- What Makes RDS Different
- Frequently Asked Questions
The Value of Warehouse Execution System (WES vs. WMS vs. WCS)
A warehouse execution system (WES) sits between the business system (ERP) and the warehouse order fulfillment activities. It connects to the ERP or WMS and operates in real time to optimize order release and determine the best way to pick, pack, and ship orders while streamlining labor using automated processes that can react to minute-by-minute operational changes. A high level and easy way to understand the difference between ERP, WMS, WES, and WCS is by the timescale each warehouse software layer operates at:
Layer | Question it answers | Time horizon | Example |
ERP / WMS | What needs to happen? What do we have, and where is it? | Hours to days | Inventory counts, order records, replenishment planning |
WES | When and how should it happen right now? | Seconds to hours | Which orders release next, which zone picks them, which picker or robot does the work |
WCS- control logic | Executes real-time command, right now | Milliseconds | Sorter divert/ sensor, high speed print and apply labeling |
WES definition: A warehouse execution system connects the ERP and its WMS functionality, or an independent WMS, to the WES brain—which manages order release optimization, order flow, and the synchronization of material handling equipment (AMRs, conveyors, AS/RS, sortation), while optimizing labor and resource utilization in real time. It determines when and how order fulfillment work needs to happen.
Most ERPs, including those with a core WMS module, are excellent at inventory, financials, business and customer management, and basic four-wall warehouse inventory and discrete order picking. Few, if any, are built to optimize complex order selection and release logic when a warehouse needs to pick split-case eaches, full cases, or oversized products from parallel storage zones to complete orders that can ship via parcel or LTL. It is a completely different type of software platform, purpose-built to synchronize picking across a combination of automation technologies, including conveyor-based pick modules, AMRs, and goods-to-person (G2P) systems.
This complex, parallel pick-zone decision logic and the orchestration of mixed automation technologies are the domain of Numina Group’s RDS-WES application software. A WES requires both a multi-variable, feature-rich order orchestration module and a warehouse control system (WCS) that uses edge-based industrial computers or a PLC-based control layer to perform millisecond-level material handling equipment controls. It also supports data-driven decisions to manage print-and-apply labeling, high-speed sortation, and other material handling automation technologies integrated within the WES software platform.
Best-Fit Warehouse Execution & Orchestration Software
“Best” depends on the distribution center’s operational size, the existing ERP/WMS, and the order fulfillment processes and technologies suited for the warehouse automation solution. At a high level, WES duties are divided into three main categories:
- Enterprise WMS platforms with emerging WES capabilities: (Manhattan Active WM, Blue Yonder/Panasonic, Infios/Körber) — Deep WMS functionality, global scale, sized for large enterprise IT budgets and 12-18+ month rollout time periods.
- Mid-market, best-of-breed WES-WCS platforms: (Numina Group RDS™, Softeon, and others) — Software platform modules with the ability to rapidly add custom functionality using RDS Voyager rules-based logic and software execution logic. Pre-developed voice directed order picking AMRs, conveyors, sorters, G2P, and the WCS equipment-control pack and ship automation integrations. Built to complement and accelerate ERP order fulfillment productivity rather than replacing existing business software. The approach is typically less disruptive with a lower risk, faster deployment, and ROI.
- Robotics-first orchestration: (Locus Robotics, GreyOrange, inVia, and interoperability platforms such as SVT Robotics) — Strong at coordinating their own or partner robot fleets, but less focused on end-to-end warehouse automation solutions requiring multiple technologies suited to the client’s complete solution requirements.
For a distribution operation, investigate a platform that focuses on warehouse process improvements with native capabilities to optimize batch and wave order release and execute automated order flow across all components of the order fulfillment operation.
Top Warehouse Execution Systems That Integrate with ERP Software
Operations teams evaluating WES options that integrate with an existing ERP often consider the following or like systems below. This overview is neutral and is not in ranked order:
System | Best fit | Notes |
Manhattan Active WM | Large enterprise, in-house large IT team and consultant development effort required | WES cloud-native WMS; broad functional, expensive in automation customization applications |
Blue Yonder (Panasonic) | Global enterprise needing planning + execution together | Full supply-chain suite; WES is a part of a much larger platform (same implementation model as above) |
Infios (formerly Körber) | Operations wanting WMS, WCS, and TMS from one vendor | Broad multi-tier product portfolio rebranded in 2025 (same implementation model as above) |
Numina Group RDS | Enterprise and Mid-market Businesses, integration a WES-WCS with an existing ERP/WMS | Combined WES-WCS and WMS lite functionality in a single platform; Software plus hardware/systems integration from one in-house team; fixed-price, milestone-based delivery |
Softeon | Mid-market WMS configurable, software-limited WES-no WCS | Comparable market focus as RDS; Softeon was acquired in 2026, now cloud focused software No integrated hardware/automation in business model. (same implementation model as above) |
Numina Group stands out by combining WES-WMS (lite features) and WCS software with in-house design, engineering, and systems integration under a single contract and team. This approach avoids the complexity of purchasing software from one vendor and hiring separate integrators, consultants, or project management teams to oversee implementation, system testing, and acceptance requirements.
How a WES Enhances the ERP & WMS Platforms
Numina Group acts as a client’s independent system integrator, taking a vendor-agnostic approach to defining the warehouse automation solution. Numina Group’s RDS serves as the warehouse “glue” for your ERP, using its multi-agent automation connector architecture and RDS Core API interface toolset to connect a blend of automation systems and data-driven decision-making. The RDS API interacts with ERP/WMS systems to exchange item master data, sales order details, inventory locations, warehouse storage maps, and shipment data.
It adds value to the ERP by supporting process improvements alongside warehouse automation technologies. Acting as the “warehouse brain,” RDS complements the ERP by keeping inventory movements and location counts synchronized with order fulfillment activities—picking, packing, shipping—and order status changes in near real time.
In practice, ERP–WES integration typically creates bidirectional data flow:
- Inbound: Order releases, inventory allocations, shipment requirements, and priority/SLA data flow into RDS. The RDS WMS Lite module can help streamline and optimize ERP-driven putaway location selection.
- Outbound: Confirmed picks, packs, shipment confirmations, lot/serial/batch data, labor and throughput metrics, and exception/error events flow back to the ERP/WMS in real time.
Because the integration runs on a standard web-service layer rather than a single-point connection, adding a new ERP or a second business system (such as a transportation management system, TMS) becomes easier using the same integration framework—without requiring a completely new custom integration project.
WES/ERP/WMS Integration Paths
RDS has confirmed, pre-built API connectors for the following platforms, developed and deployed in production integrations:
Platform | Category | Integration path |
SAP | ERP | Pre-built API connector; also delivered via Numina’s SAP-focused partnership network |
Oracle (E-Business Suite / Oracle ERP) | ERP | Pre-built API connector to Orchestrator |
JD Edwards EnterpriseOne | ERP | Pre-built API connector to Orchestrator |
Microsoft Dynamics 365 / Dynamics | ERP | Pre-built API connector |
Blue Yonder / JDA | WMS | Pre-built API connector |
Manhattan Associates | WMS | Pre-built API connector |
HighJump (now Infios) | WMS | Pre-built API connector |
Acumatica, Infor, NetSuite, Epicor, Profit 21, | ERP | Multiple RDS WES-WCS customer integrations |
Beyond the above vendor list, RDS’s universal REST/API web-service architecture allows RDS to connect to virtually any ERP or WMS—including cloud-based ERP platforms such as NetSuite, Odoo, Infor, and Epicor—through the same connector framework rather than a bespoke integration project.
Signs You’ve Outgrown ERP Warehouse Functionality & Need a WES
The ERP warehouse capabilities can fit the operation needs at the initial install, but as the business grows, it can become a throughput constraint to keep up with a mix of order types, increased volume, SKU count and mix, and customer value added services.
Here are the top signs your ERP is longer meeting the warehouse needs:
- Picker travel time has grown over the years, and they are revisiting the same zones sometimes in the same hour.
- Work tasks are not enforced in a step-by-step manner across the shortest travel path due to the ERP lacking batch order picking optimization.
- Supervisors lack the ability to view, manage, and change an order’s priority level.
- No user interface screens to view and edit the batch/order wave prior to order release.
- Supervisors cannot adjust order release to accommodate workloads and shift labor conditions or manage eternal warehouse events such as weather, road closures, or truck breakdowns.
- Work task assignments are human decisions, not automatically enforced.
- Paper and people make critical business decisions in order fulfillment operations.
- No ability to interleave and prioritize the operator’s ability to perform put-away, picking, and replenishment work tasks.
- Current conveyors, sorters, and goods-to-person systems work as islands of automation.
- Order errors are too high despite additional training, suggesting the problem is process or lack of enforced picking, scanning, and shipment validation technology, not people.
These symptoms indicate that the ERP-WMS lacks the functionality needed to manage warehouse automation requirements. The operations team knows what needs to happen and attempts to add human-in-the-loop decision logic; however, without the right software tools to execute, verify, and adjust order release and real-time order picking across multiple zones, it becomes difficult for people to manage at higher order volumes and complexity levels. These common operational challenges fall within the WES domain. It is designed to improve warehouse order flow by adding missing functionality to the existing ERP-WMS platform.
How to Calculate WES ROI Beyond Labor Savings
Labor cost reduction is one key benefit that WES and automation bring to a warehouse operation, but it is not the only value driver. A labor-savings-only ROI model can understate the business case for a WES. A more complete ROI includes four categories:
1. Throughput
Orders or lines processed per labor-hour, and per square foot of DC footprint. A WES that increases lines-per-hour without adding headcount raises effective capacity—often the difference between fulfilling 25% more orders in a single shift, avoiding the cost to manage a second shift or opening a new facility.
2. Order Accuracy
Fewer mispicks, shipment returns, damage occurrences, and non-value-added audit and returns-handling work. Retailer and Amazon chargebacks, along with compliance fines, can lead to loss of customers.
3. Peak Season Labor Elasticity
The ability to manage a 2–3x peak-season volume surge without a proportional increase in temporary labor or overtime costs. Provides a direct, quantifiable ROI component in justifying the WES productivity gains compared to the status quo.
4. SLA Compliance
On-time-in-full (OTIF) rate and same-day/next-day cutoff automated prioritization logic enforce same-day order shipment flow from order release through pick, pack, and ship fulfillment. When operations have contractual or e-tailer requirements such as Amazon and retail compliance SLA penalties, the WES automatically enforces business rules, helping avoid penalty costs while enabling measurable customer service improvements and providing an auditable line item in the ROI model.
Business savings captured at existing Numina Group RDS customers using a blend of automation technologies show labor cost reductions of 25% to 70%, and lines-picked-per-hour improvements of 30% to 50% or more per operator hour when deploying the RDS Voice Suite, voice picking with scan validation, and pack-and-ship automation conveyor systems integrated with RDS order scan, weight, and vision audit verification technology. Voice picking combined with pack-and-ship automation has increased shipment fulfillment accuracy to the RDS 99.98% level. When operations improve both picking KPIs and accuracy to these levels while also accelerating packing through a blended set of RDS automation technologies, warehouses can see payback periods under 22 months, with some operations achieving ROI in as little as 14 months.
Warehouse Execution Systems that Scale from One to Multiple Sites
Scalability in a WES and cost-effectiveness when the software needs to extend across a central and multiple branch DC business model is a key advantage of a WES application. Execution of a distributed site order fulfillment operation, along with flexibility in physical deployment on virtual servers or edge-based, cost-effective industrial hardware servers, makes a WES the platform of choice for replicating best-practice operational implementations across downstream locations.
- Order volume: RDS scales from small regional branch DCs with as little as 400 to 600 orders a day to mid-sized and large central operations shipping 10,000-50,000 orders per day.
- Deployment footprint: Supports edge computers, virtual servers, and cloud environments based on application control, response, decision-making, and execution requirements.
- Multi-site TMS integration for LTL and multi-carrier parcel shipping and manifesting, using a tightly coupled architecture that integrates ERP/WMS–WES–WCS connectivity and transport and carrier logic, including rate shopping across carriers within the WES order release layer.
For a multi-site operation, the practical benefit is a single order-orchestration and reporting layer across facilities, even where individual sites run different WMS versions, different automation vendors, or different carrier contracts underneath.
WES Implementation Timeline & What to Expect
“How long does a project take to implement” is a frequently asked question alongside ROI in automation. Transparently the answer is that it depends on the scale and scope of the automation project from the ERP/WMS API connectors, the blend of automation technologies associated with the systems orchestration, and number of sites. A representative phased rollout can be 6-9 months to 18 months:
Phase | What happens | Typical focus |
1. Discovery & design | Current-state process mapping, ERP/WMS connector scoping, automation inventory | Define scope and success metrics before writing a line of configuration |
2. Connector & environment build | ERP/WMS API connector configuration, deployment environment setup (cloud/edge) | Get data flowing bidirectionally in a test environment |
3. Phased go-live | Run RDS improved pick process while the rest of the operation continues as-is | Validate logic and performance against real order volume with contained risk |
4. Phased rollout | Additional zones, shifts, or sites brought on in sequence | Scale without a single high-risk cutover event |
5. Optimization | Tuning of order-release rules, labor/automation balancing, and reporting | Capture the throughput and accuracy gains the business case was built on |
Because RDS is delivered on a fixed-price, milestone-based model rather than open-ended time-and-materials, clients get a committed timeline and cost up front instead of an estimate that can drift as scope is discovered mid-project—a meaningful difference from vendors who price and staff implementation as professional services.
Brownfield Integration with Existing Warehouse Software & Automation
Most WES implementations used for managing a blend of automation technology decisions are brownfield, not greenfield facilities. This is typically how organizations extract more value from existing ERP investments. The core question becomes how to enhance ERP-WMS performance and improve order picking, packing, and shipping processes across existing conveyor, sortation, and storage systems.
Numina Group’s services, along with its RDS-WES platform, are explicitly designed to bolt on improved processes and automation to an existing ERP-WMS, effectively extending and optimizing current warehouse operations without replacing core systems.
This works through three supported integration models:
- Standalone WCS: RDS’s equipment-control layer connects directly to an existing ERP or WMS, adding real-time automation control without modifying the business system.
- Integrated WES-WCS: Both the order-orchestration and equipment-control layers operate as a unified platform layered on top of the existing ERP/WMS.
The goal of this architecture is to eliminate “islands of automation—a common brownfield challenge where conveyor, sortation, voice, and AMR systems operate under separate control systems with no shared visibility or coordination, even while processing the same orders within the same facility.
How WES Orchestrates People, AMRs, & Automation
Real-time orchestration is easiest to envision in an example installation. Numina’s Batchbot 2.0 order-orchestration layer coordinates a mixed AMR fleet directly against pick-operator location and workload:
- A multi-parameter machine-learning algorithm evaluates pick-operator position in real time against active AMR missions.
- A weighted distance-time cost calculation determines which operator should intercept which robot next—a mode Numina calls “Meet Me Mode,” rather than operators waiting or walking to an AMR using a Follow Me Mode for executing the picking tasks after it arrives at each destination.
- The Victory Voice picking suite proactively directs operators to the AMR’s next stop and provides hand-free voice instructions for each pick, including product scanning and placement on the AMR batch-pick cart, while optimizing people and AMR movement across zone-based pick aisles.
- Customer reported results from AMR-Operator coordinated movement is over 25% faster end-to-end AMR trip time, reducing 15 minutes of wasted travel time per hour from each operator allowing 300+ line picks per hour.
The same RDS orchestration layer extends across multiple automation technologies, including goods-to-person (GTP) systems, pick-to-conveyor pick modules, manual batch order carts, and forklift-based case and each-order picking.
Additional modules that differentiate RDS-WES include cartonization logic (sizing and packing based on SKU dimensions, fragility, and compression), pack-and-ship automation, and print-and-apply labeling—all coordinated from the order-release and task-assignment and rules engine to unify the warehouse automation solutions within a single system.
RDS Modules & Value-Add Features
Module | What it does | Customer benefit |
Order Orchestration & Release | AI/ML-driven wave and batch optimization; dynamic order release and prioritization; real-time labor/automation balancing across zones | Higher lines-per-hour without added headcount; SLA-aware order sequencing |
Victory Voice™ Picking Suite | Voice-directed, hands-free/eyes-focused picking; speaker-independent AI neural network, ~20-minute operator training | Up to 99.9%+ pick accuracy; faster onboarding than paper or RF picking |
AMR & Robotics Orchestration | Vendor-agnostic coordination of mixed AMR fleets (“Meet Me Mode”) weighted distance-time routing of AMRs and People | Eliminates operator wait time; works across multiple robotics vendors rather than locked into one vendor |
Goods-to-Person (GTP) Orchestration | Synchronizes GTP/pick-to-light stations with order release and labor assignment | Reduces travel time; concentrates picking at high-density stations |
WCS / Equipment Control | Real-time conveyor, sortation, AS/RS, and mini-load control | Coordinates physical automation as one system instead of separate control panels |
Cartonization | SKU size, fragility, and compression-based packaging optimization | Reduces void fill and dimensional-weight shipping cost; supports lowest-rate carrier selection |
Pack & Ship Automation (Pakt™) | Automated pack-and-ship line integration, scan-weigh-dimension, print-and-apply labeling | Reported throughput improvements up to ~500% versus manual pack stations |
Labor Management & Analytics | Real-time labor tracking, performance reporting, WebView dashboards | Floor-level visibility without waiting for end-of-shift reporting |
What Makes RDS-WES Different
RDS-WES offers more capabilities than other WES vendors. The combination of the features above reflects RDS’s distinct value-added functionality:
- Real-time order orchestration with dynamic release and prioritization: Order release and task assignment continuously re-optimize based on live floor conditions, not a fixed batch schedule.
- Native voice picking integration: Victory Voice is built into the orchestration layer itself, not bolted on as a separate module from a different vendor.
- Goods-to-person and multi-vendor AMR orchestration in the same platform: RDS coordinates GTP stations and mixed robotics fleets from multiple vendors side by side, rather than requiring a separate control system for each automation type or robot brand.
- RDS WES-WMS with a best-in-class WMS module for existing ERP systems: RDS’s latest software module provides WMS functionality typically found only in Tier One WMS platforms. The RDS WMS Lite module includes slotting optimization for put-away based on cube, A/B/C SKU velocity, SKU affinity, and historical order data. Additionally, replenishment, cycle counting, and picking tasks are prioritized, assigned, and interleaved using the RDS Voice Suite.
- One platform managing the complete warehouse operation: Order release, picking, GTP, AMRs, conveyor/sortation, packing, and shipping are all coordinated within a single system rather than a collection of disconnected point solutions, each optimizing only its own area.
Numina Group positions the value of RDS as a WES in its ability to deliver compounding operational benefits by orchestrating the entire warehouse, not just individual automation areas. This is the key difference between a warehouse running multiple separate systems and one operating as a fully coordinated system.
Frequently Asked Questions
What is a warehouse execution system (WES)?
A WES is software that manages real-time order fulfillment, determining when and how work happens on the warehouse floor by connecting your ERP/WMS (which knows what orders and inventory are available) with the engine that optimizes and prioritizes order execution and manages order flow across picking, packing, and shipping. The WES also enables more efficient voice-directed picking using existing forklifts and batch pick carts, along with the right blend of material handling automation at the DC, to reduce labor costs and increase orders-per-hour throughput.
How long does WES implementation take?
Implementation timelines depend on warehouse size, project scope, automation complexity, and the number of ERP/WMS connectors. A goods-to-person (GTP) project typically requires a nine- to ten-month site implementation. Projects without GTP can take six to nine months from design phase to beneficial use, followed by a 30-day hypercare go-live period. Numina Group software modules are sold on a fixed-price model. If a project requires a customized module, that work is estimated and billed on a time-and-materials basis. Final timelines and costs are provided after the detailed design phase is complete.
How do customers calculate WES ROI beyond labor savings?
Numina Group has developed a model covering several categories: increased operational throughput versus the current operation; reduction in labor usage, captured and agreed to with the customer during the design phase based on lines, orders, and existing labor hours; order accuracy improvements (error reduction, return freight, and compliance penalty costs); peak-season elasticity (cost per order at peak versus baseline); and SLA compliance (avoided penalty costs from missed on-time-in-full commitments).
Do I still need a WES if I already have a WMS?
Yes. A WES delivers efficiencies to the warehouse that a WMS alone simply can’t provide. When order flow isn’t fully connected end to end, a limitation common in ERPs with only basic WMS functionality, bottlenecks build fast once volume crosses 2,000+ orders per day, especially during peak periods.
Can a WES scale across multiple sites and carriers?
RDS scales from mid-market distribution centers processing from 3,000 orders per day to large-scale warehouses handling 100,000 or more daily orders. It supports multi-site deployments and scales automation to match each central or branch DC’s order volume. RDS is especially effective for hub-and-spoke networks with one or more central distribution centers and multiple branch operations. It can also integrate transportation and shipping-manifest decisions before order release, helping each order use the best, lowest-cost shipping method while meeting customer delivery requirements.
Ready to Stop Leaving Throughput & Money on the Table?
Every day your operation runs without full order orchestration is a day of lost lines per hour, avoidable errors, and labor spent standing still instead of picking, packing, and shipping. Numina Group is proven to close that gap, whether you are standing up a new site or upgrading an existing operation.
The next step is simple: a discovery conversation to understand your current DC challenges, order volumes, pick rates, and pain points. We will work with your team to identify key improvements and evaluate RDS’s ability to deliver operational gains and ROI in your environment.
Contact Patrick Hanrahan, VP of Business Development, at phanrahan@numinagroup.com to schedule your discovery call and begin an ROI assessment.
Reach out today to put Numina Group’s warehouse automation expertise to work in improving your warehouse productivity and profitability.
