This informal CPD article ‘Open and Closed Technology Architectures: Long-Term Considerations’ was provided by Cortech Developments, who provide a single point of real time monitoring and control for all building fire and security systems.
Technology architecture decisions can influence an organisation for many years. In security environments, systems may remain in service through several technology cycles, while individual components are replaced at different times.
One consideration is whether an architecture is relatively open or closed. These terms can mean different things in different markets, so they should be treated as descriptions of design characteristics rather than automatic indicators of quality. The relevant question is how easily an organisation can connect, replace and manage technologies over time.
What is an open architecture?
An open architecture generally aims to support interoperability between components, often through documented interfaces, standards or supported integration methods. A closed architecture may rely more heavily on a defined vendor ecosystem or proprietary interfaces. (1)(2)
Neither model removes the need for technical governance. Multi-vendor environments can introduce compatibility, testing and support challenges. Conversely, a tightly controlled ecosystem can simplify responsibility and deployment while reducing the range of future choices. The practical distinction is therefore about flexibility and dependency, not simply whether a system is marketed as 'open'.
Vendor dependency and lifecycle risk
Technology lifecycles rarely align. One component may need replacement because of hardware failure, while another remains supported for several more years. If systems are tightly dependent on one another, replacing one component can become more difficult or expensive.
Interoperability can reduce some of these constraints by allowing organisations to introduce replacement technologies without necessarily replacing every connected component. However, this depends on the quality of the interfaces and the extent to which they are documented, tested and maintained. (1)(2) Research has long identified interoperability and standards as mechanisms that can support supplier independence and reduce the effects of technological obsolescence. (1)(3)
Questions for procurement and specification
Rather than asking simply whether a platform is open, organisations can ask more specific questions. What interfaces are available? Are they documented? Which standards are supported? Can data be exported in usable formats? What happens if a connected product is discontinued? Can components be replaced independently? Who is responsible for maintaining integrations after an upgrade?
It is also useful to distinguish between technical openness and commercial openness. A system may support many interfaces but still impose contractual restrictions, or it may be technically interoperable while requiring specialist development for each connection. Clear requirements at procurement stage can reduce uncertainty later.
Balancing flexibility with control
Open architectures do not remove the need for governance. Every additional interface creates another dependency that should be documented, tested and secured. Organisations should therefore evaluate interoperability alongside cyber security, performance, support arrangements, skills and lifecycle costs.
The most appropriate architecture will depend on the site’s operational requirements and risk profile. A useful evaluation process should focus on the organisation’s future needs rather than assuming that either open or closed is universally appropriate. The central lesson is that architecture choices should be assessed over the expected life of the environment. Flexibility, interoperability, support and exit options are all relevant when determining how resilient a technology investment may be to future change.
We hope this article was helpful. For more information from Cortech Developments, please visit their CPD Member Directory page. Alternatively, you can go to the CPD Industry Hubs for more articles, courses and events relevant to your Continuing Professional Development requirements.
References
- NIST, Biometric Standards: https://www.nist.gov/publications/biometric-standards
- NIST, Specification of Interactions in Integrated Manufacturing Systems: https://www.nist.gov/publications/specification-interactions-integrated-manufacturing-systems
- NIST, The Role of Standards in Product Lifecycle Management Support: https://www.nist.gov/publications/role-standards-product-lifecycle-management-support
