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For Owner-Operators · Strategy · Procurement · Execution
Open Process Automation for owner-operators From first decision to operating system
An owner adopting O-PAS™ is making more than a control-system purchase. It is choosing an architecture, a supplier model, an integration strategy and a way to govern the system over its operating life. This guide sets out the decisions that make that transition executable.
The short answer
Owner-operators should begin an Open Process Automation program by defining the business decision, not by selecting products. Establish why the organization needs a different automation architecture, choose a first deployment that can test the important assumptions, define who owns system integration, and write the acceptance evidence before issuing the request for proposal.
The first project should produce two outcomes: an operating system that solves a real facility need, and reusable architecture, procurement, testing and governance assets that reduce the cost and uncertainty of every project that follows.
CSI helps owner-operators build that path from strategy and lifecycle economics through architecture, integration, verification and commissioning.
01 · Decision trigger
When is Open Process Automation the right decision?
OPA is most useful when the owner needs to change the economics or constraints of the automation lifecycle, not simply replace equipment with newer equipment.
Aging proprietary infrastructure
The installed system is approaching a major refresh, support costs are rising, or the owner faces another disruptive platform migration with limited competitive choice.
Control knowledge is trapped
Valuable control applications, libraries and operating logic cannot move without redevelopment, retesting and dependence on one supplier's engineering environment.
The owner needs component-level choice
The organization wants to select, replace or refresh components independently while preserving the wider system architecture and the applications that create operating value.
New capability cannot enter fast enough
Analytics, advanced control, edge computing or new applications are delayed because each addition requires proprietary integration or a major platform event.
The decision test
If the objective is only a like-for-like control-system replacement, OPA may add architecture and integration work without using the lifecycle options it creates. The business case becomes stronger when the owner intends to use modular refresh, application portability, competitive sourcing or incremental modernization.
02 · First deployment
Choose a project that proves the decisions that matter
The first deployment should solve a real operating need while remaining bounded enough to produce clear evidence. A demonstration with no operational consequence teaches too little; an enterprise-wide replacement asks the first project to carry too much.
| Candidate | Why it can work | What to watch |
|---|---|---|
| Greenfield unit or facility | No legacy cutover and a clean architecture boundary. | The project still needs a real operations, support and lifecycle model. |
| Obsolete subsystem replacement | Connects OPA adoption to a funded business need. | Interfaces to the retained DCS and field systems must be explicit. |
| Advanced application platform | Tests application deployment and independent computing capability. | Adding an application does not prove a complete control architecture. |
| Noncritical utility or terminal | Real operations with a manageable process and risk boundary. | Acceptance and operational ownership must remain production-grade. |
| Integration environment | Tests architecture and supplier assumptions before site execution. | It generates evidence but does not replace production experience. |
Score the candidate before committing
Real need
Would the organization fund this project even if it were not the first OPA deployment?
Representative scope
Does it test the interfaces, applications, lifecycle actions and supplier boundaries the future program will depend on?
Bounded risk
Can the project be isolated, tested and recovered without exposing the entire facility to first-project uncertainty?
03 · Economics
Build the business case around the automation lifecycle
Comparing purchase prices misses the reason to adopt an open architecture. The owner needs two lifecycle cash-flow scenarios built on the same horizon, production assumptions and financial rules.
Continue with the current architecture
- Planned controller, server and network refreshes
- Software support and licensing
- Engineering tools and specialist labor
- Application migration and revalidation
- Major upgrade downtime and production risk
- Cybersecurity and obsolescence exposure
Move toward a modular architecture
- Architecture and requirements engineering
- Multi-vendor integration and testing
- Application portability and library strategy
- Incremental component refresh cycles
- Competitive lifecycle sourcing
- Training, governance and organizational change
Evidence rule: separate known facility data, supplier estimates, external benchmarks and management assumptions. A benchmark can define a range; it should not be presented as a guaranteed project result.
04 · Ownership
An open architecture requires an explicit operating model
A traditional DCS hides many lifecycle responsibilities inside one supplier's product and support model. A multi-vendor system makes those responsibilities visible. The owner must decide who holds them.
| Responsibility | Owner decision required |
|---|---|
| Architecture authority | Who controls the target architecture, approved interfaces and deviations over time? |
| System integration | Who holds single-point responsibility for the integrated system during the project and after handover? |
| Application ownership | Who owns source, libraries, deployment packages, test records and future portability decisions? |
| Configuration management | How are versions, dependencies, updates and recovery baselines controlled across suppliers? |
| Cybersecurity | Who coordinates vulnerabilities, patches, identity, monitoring and incident response across component boundaries? |
| Interoperability | Who resolves a failed interface when each supplier says its own product meets its requirements? |
| Lifecycle support | Who qualifies replacement components and validates changes after the original project team has gone? |
Use CSI's O-PAS Responsibility Matrix to assign these activities across the owner, EPC, system integrator and component suppliers before commercial positions harden.
05 · Procurement
Write the outcome, evidence and responsibility into the RFQ
“The system shall comply with O-PAS” is not a sufficient procurement requirement. It does not identify applicable profiles, architecture, project interfaces, acceptance evidence or who is responsible for making the complete system work.
Define the system boundary
State the intended architecture, retained systems, packaged-unit interfaces, field boundaries and functions the project must provide.
Name applicable requirements
Use the O-PAS Vendor and Product Landscape to identify candidate products by architecture role, then confirm the applicable profiles and evidence for each component.
Assign integration responsibility
Name the party accountable for architecture, multi-vendor integration, failed interfaces, the test environment, correction cycles and final acceptance.
Define what acceptance requires
Use the CSI O-PAS Certification Tracker to separate product conformance evidence from project interoperability, functional, recovery, security and lifecycle testing.
Protect owner assets
Specify source, library, configuration, documentation, deployment package, version and test-record handover requirements.
Define day-two support
Require the monitoring, patching, spares, escalation, training and change-management model needed after commissioning.
06 · Applications
Application portability has to be engineered and tested
The owner's control applications contain decades of operating knowledge. Portability is valuable only when the owner can preserve that knowledge, deploy it through a controlled workflow and demonstrate acceptable behavior in another compatible environment.
Define the application asset
Identify languages, libraries, function blocks, dependencies, configuration, documentation and test assets that must remain available to the owner.
Control the deployment unit
Define how applications are versioned, transferred, deployed, rolled back and associated with their approved runtime and system configuration.
Prove the required portability
Test functional behavior, timing, interfaces, alarms, recovery and performance in the target environments the owner intends to use.
The ownership question
The owner should be able to identify what it owns, what is portable, what remains supplier-specific, what evidence demonstrates portability and what engineering is still required when the application moves.
07 · Assurance
Product conformance and project acceptance are different evidence
Conformance applies to a product against specified requirements and profiles. The owner still needs evidence that the selected products operate together in the project architecture, under the facility's loading, configuration and failure conditions.
| Evidence layer | Question it answers |
|---|---|
| Supplier evidence | What product, version and profile claims does the supplier make, and what documentation supports them? |
| Conformance evidence | Which applicable requirements have been independently verified through the recognized certification process? |
| Interoperability testing | Do the selected components exchange information and behave correctly at their real project boundaries? |
| Functional FAT | Does the integrated system perform the required control, alarm, sequence, interlock and operator functions? |
| Resilience and recovery | How does the system respond to network, component, service and configuration failures? |
| Lifecycle testing | Can applications and components be updated, restored or replaced through the workflows the owner will use in service? |
CSI's O-PAS FAT and Interoperability Testing Guide sets out the integration environment, boundary scenarios, acceptance criteria, correction cycles and final evidence package.
08 · Roadmap
A practical owner-operator adoption sequence
The sequence matters. Product selection before architecture and responsibility definition converts strategic choices into supplier assumptions.
- 1
Define the decision
State the lifecycle, business and operating constraints the architecture must change.
- 2
Establish the baseline
Document the installed estate, costs, modernization events, applications, support model and business exposure.
- 3
Set architecture principles
Define openness, portability, interoperability, cybersecurity, ownership and lifecycle requirements before products.
- 4
Select the first project
Choose a funded operating need with representative learning value and bounded execution risk.
- 5
Assign responsibility
Name the architecture authority, integrator, supplier boundaries, acceptance authority and support owners.
- 6
Procure evidence
Write the required interfaces, profiles, deliverables, tests and correction obligations into the contract.
- 7
Integrate and verify
Test component boundaries, functional behavior, resilience, deployment and recovery before cutover.
- 8
Capture and reuse
Turn architecture, test assets, supplier evidence and lessons into the next project's starting point.
09 · Evidence in practice
From lighthouse project to commercial deployment
ExxonMobil's Anchorage Chemical Terminal project shows what repeatable delivery looks like. The terminal had a real automation need, OPA requirements were included in competitive procurement, and the work proceeded through a conventional commercial project structure.
CSI designed the COPA 500 system and worked with Wood and CPLANE to implement it for ExxonMobil. The project completed factory acceptance testing and entered production in June 2026.
The significance was not project size. ACT showed that an O-PAS-based system could be specified, procured, integrated and commissioned without recreating the owner-led R&D model used for the earlier Lighthouse deployment.
ExxonMobil ACT commercial O-PAS deployment
See the roles, architecture, procurement model, first-party software approach, FAT scope and lessons for future projects.
Read the case study →10 · Owner support
How CSI supports owner-operators
CSI can support the whole decision sequence or a defined module where the owner needs independent O-PAS expertise.
Readiness and roadmap
Current-state assessment, decision framing, deployment sequencing, organization readiness and first-project selection.
Business case
Lifecycle baseline, OPA scenario, sensitivity analysis, evidence classification and capital decision support.
Requirements and design
Target architecture, interfaces, profiles, application strategy, cybersecurity and lifecycle requirements.
Procurement support
RFQ requirements, bid evaluation, supplier evidence, responsibility boundaries and integrator selection.
Integration and verification
Multi-vendor integration, test-environment planning, FAT, interoperability, recovery and commissioning support.
Governance and training
Architecture authority, lifecycle processes, owner documentation, operating-team preparation and O-PAS education.
Frequently asked questions
Owner-operator OPA questions
How should an owner-operator start an Open Process Automation program?
Begin with the business and lifecycle decision. Establish the current automation baseline, identify the constraints the new architecture must change, define owner architecture principles, and select a bounded project that solves a real operating need. Product selection should follow architecture, responsibility and acceptance decisions.
Is OPA better suited to greenfield or brownfield projects?
Both can be appropriate. Greenfield projects provide clean system boundaries and avoid legacy cutover. Brownfield projects can connect adoption to an existing obsolescence or modernization need, but require an explicit coexistence, gateway, application-migration and cutover strategy. The better first project has a real business need, representative learning value and manageable execution risk.
What changes in an O-PAS procurement package?
The package should identify the target architecture, applicable profiles, supplier boundaries, system-integration responsibility, application and handover requirements, interfaces, testing scope, acceptance evidence, correction obligations and lifecycle support model. A general requirement for O-PAS compliance does not define these items. Use the O-PAS Procurement Specification Checklist to turn them into an RFQ and bid-review structure.
Does product conformance guarantee interoperability?
No. Conformance evidence addresses a product against specified requirements and profiles. Project interoperability depends on the selected products, versions, configuration, architecture, loading and operating scenarios. Owners should require relevant product evidence and project-level interoperability testing.
Who should own multi-vendor system integration?
A named party should hold responsibility for the integrated system. That role may be assigned to a specialist OPA integrator, an EPC with appropriate capability or another defined delivery entity. The owner should avoid dividing product supply among vendors while leaving responsibility for failed interfaces implicit.
How does an owner protect application portability?
Specify the application languages, libraries, interfaces, dependencies, source, configuration, documentation, deployment packages, versions and test assets that must be delivered. Then test the required deployment and functional behavior in the compatible environments the owner intends to use.
What does CSI deliver for owner-operators?
CSI supports OPA readiness, lifecycle business cases, first-project selection, O-PAS architecture and requirements, procurement, integrator evaluation, multi-vendor system design, integration, FAT and interoperability testing, commissioning, governance and training.
Start with the decision
Define the architecture before the procurement package defines it for you.
CSI can review your installed estate, business drivers and first-project candidates, then turn them into an executable OPA roadmap.