Plex MES
by Rockwell Automation (Plex) · Manufacturing (MES / PLM)
Cloud MES for real-time production, quality, and traceability, connected to enterprise ERP.
- Works with
- SAP, Oracle
- Deployment
- Cloud
- Company size
- Mid-market, Enterprise
- Pricing
- Quote-based
- Founded
- 1995
- Headquarters
- Troy, Michigan, United States
Overview
Plex MES is the manufacturing execution system component of the Plex Smart Manufacturing Platform, sold by Rockwell Automation after its 2021 acquisition of Plex Systems (originally founded in Michigan in 1995). It provides real-time, paperless production management on a single-instance, multi-tenant cloud architecture, covering production monitoring, scheduling, quality management, and end-to-end traceability on the shop floor.
Rockwell Automation has positioned Plex as complementary to, rather than competitive with, large corporate ERP systems: many customers run Plex MES (or Plex's plant-level ERP) at the plant level while it feeds data up into SAP or Oracle for corporate-level ERP, letting manufacturers modernize the shop floor without a full ERP rip-and-replace.
Plex MES is used across discrete and process manufacturing, with dedicated variants for regulated and specific verticals (e.g., PharmaSuite for pharma, CPGSuite for consumer packaged goods), and is marketed heavily to automotive, aerospace, food & beverage, industrial, plastics, and metalforming manufacturers.
Screenshots & demo
Demo video from the vendor's YouTube channel.
Features & capabilities
Production Management & Scheduling
Real-time control of production execution and finite scheduling.
- Finite production scheduling across work centers
- Real-time production monitoring and OEE tracking
- Paperless work order management
- Machine and equipment connectivity
Quality Management
Closed-loop quality control integrated with production.
- In-line quality control plans
- Non-conformance and corrective action management
- Statistical process control (SPC)
- Regulatory/compliance documentation (e.g., FDA-relevant workflows)
Traceability & Inventory
End-to-end tracking of materials and product genealogy.
- Product genealogy and lot traceability
- Work-in-progress (WIP) tracking
- Inventory accuracy and cycle counting
- Supplier and material lot tracking
Connected Worker
Digital tools for shop-floor operators.
- Digital work instructions
- Operator guidance and training support
- Real-time task assignment
MES Automation & Orchestration
Plant-edge process automation layer connecting Plex MES to machines and systems (formerly Kors Engineering Mach2).
- Edge-to-MES data orchestration
- Automated data collection from plant-floor equipment
- Process automation rules to reduce manual data entry
Asset Performance Management
Monitoring of machine and plant health.
- Machine health and uptime monitoring
- Predictive maintenance signals
- Throughput and downtime analysis
Connectivity & Integration
Links between the shop floor, Plex's own ERP/QMS/SCP modules, and external corporate ERP systems.
- Full connectivity to ERP and third-party external systems
- Integration with Plex ERP, QMS, and Supply Chain Planning modules
- API-based data exchange with corporate ERP (SAP, Oracle)
Common use cases
- Digitizing a paper-based shop floor with real-time production monitoring and OEE tracking
- Running plant-level MES/ERP while feeding production data up into a corporate SAP or Oracle instance
- Achieving end-to-end lot traceability and genealogy for regulated or safety-critical parts (automotive, aerospace, food & beverage)
- Consolidating multiple legacy plant systems (e.g., MFG/PRO, SAP, Oracle, Hyperion) onto a single manufacturing platform across global plants
- Automating quality control plans and non-conformance workflows to pass audits and reduce scrap
- Connecting plant-floor machines and edge devices to MES via automation/orchestration rules to cut manual data entry
- Improving inventory accuracy (e.g., from ~70% to ~99%+) through database-driven, real-time inventory tracking
Strengths & considerations
Strengths
- Single-instance, multi-tenant cloud MES architecture built specifically for manufacturing, rather than a bolt-on module of a general ERP suite
- Explicit 'land and expand' positioning: designed to sit alongside and feed data into large corporate ERPs like SAP and Oracle rather than replace them outright
- Backed by Rockwell Automation's broader industrial automation and FactoryTalk software portfolio, adding plant-floor hardware/software integration depth
- Deep vertical-specific variants (PharmaSuite, CPGSuite) built on the same core MES platform
ERP integrations
Plex MES runs at the plant level and synchronizes production, inventory, and quality data up into corporate SAP ERP instances; Rockwell has stated Plex is not positioned to compete with SAP for corporate ERP.
Similar plant-to-corporate integration pattern used with Oracle ERP; documented in customer cases such as Motus Integrated Technologies consolidating MFG/PRO, SAP, Oracle and Hyperion onto Plex.
Pricing
Plex does not publicly list pricing; cost is quoted based on modules selected, number of users/plants, and implementation scope. Third-party estimates (not vendor-confirmed) suggest costs can range from roughly $2,000-$5,000/month for a small deployment to $15,000-$40,000+/month for larger enterprise rollouts. Get an independent shortlist with pricing guidance below.
Technical & security
- Hosting
- SaaS (single-instance, multi-tenant)
About the vendor
- Founded
- 1995
- Headquarters
- Troy, Michigan, United States
- Ownership
- Subsidiary of Rockwell Automation (acquired 2021 for $2.22 billion)
Alternatives to Plex MES in Manufacturing (MES / PLM)
Plex MES — frequently asked questions
Does Plex MES integrate with SAP?
Yes. Plex MES is typically deployed at the plant level and connects via API/data integration to corporate SAP ERP instances, synchronizing production, inventory, and quality data. Rockwell Automation has said it does not position Plex to compete with SAP for corporate-level ERP, favoring a 'land and expand' approach alongside existing SAP deployments.
How is Plex MES priced?
Plex does not publish list pricing. Cost is quote-based, driven by the modules selected, number of users and plants, and implementation scope; you need to contact Rockwell Automation/Plex sales for a specific quote.
Is Plex MES the same as Plex ERP?
No. Plex MES is the manufacturing execution system module of the broader Plex Smart Manufacturing Platform, which also includes separate ERP, Quality Management (QMS), and Supply Chain Planning modules. Customers can use Plex MES standalone alongside a non-Plex corporate ERP such as SAP or Oracle, or combine it with Plex's own ERP module.
Who owns Plex MES?
Plex Systems was founded in 1995 and acquired by Rockwell Automation in 2021 for $2.22 billion. Plex MES is now sold and supported as part of Rockwell Automation's FactoryTalk software portfolio.
Evaluating Manufacturing (MES / PLM)?
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