Knowledge base

Commissioning ensures that a Data Center facility is ready to operate as designed. The process includes verification, testing and start-up of the facility’s technical systems, confirming that all installations perform in accordance with the design, client requirements and operational objectives.

Commissioning helps identify and resolve issues before the facility enters operation. This reduces the risk of failures and supports reliable infrastructure performance.

BCA Engineering Group can be involved at any stage of a Data Center project, but we bring the biggest value when we join projects early. This allows us to develop a commissioning strategy and identify potential risks before they become costly issues.

At which stages of a project does BCA Engineering Group add value?

Design stage: Support with design reviews and risk identification before construction begins.

Construction stage: Quality control od infrastructure’s installation, verification against the design and preparation for system start-up.

Commissioning stage: System testing, configuration and initial start-up.

Final testing and handover stage: Functional and Integrated Systems Testing (IST), followed by confirmation of the facility’s operational readiness.

Handover: Final documentation and support for the operations team during the transition into operation.

The earlier the commissioning team is involved, the lower the risk of late-stage changes, rework and delays.

The Commissioning Agent (CxA) acts as an independent technical expert, verifying the commissioning process and confirming that systems meet project requirements, applicable standards and the client’s expectations.

The Commissioning Manager (CxM) is responsible for planning, coordinating and managing the overall commissioning process, including the schedule, tests’ organization and cooperation between all project stakeholders.

Combining the CxA and CxM roles provides effective management of the commissioning process together with an independent assessment of system quality and readiness for operation.

Commissioning is structured as a stages sequence, from planning and test preparation through to final handover. Each stage includes defined checks and tests, with progression based on meeting the requirements of the relevant level.

1. Design & Planning (L0) – Developing the commissioning strategy, documentation, requirements and schedule.

2. Equipment Testing (L1) – Verification of equipment at the manufacturer’s facility before delivery to site, including FAT.

3. Installation & Checks (L2) – Verification of delivery, installation and pre-start-up conditions.

4. System Start-up (L3) – Energization and initial start-up of systems, preparing them for functional testing.

5. Functional Testing (L4) – Verification of individual systems under different operating scenarios.

6. Integrated Systems Testing (L5) – Verification of how all systems operate together, including operational and failure scenarios.

7. Closeout & Handover (L6) – Final verification, documentation and handover of the facility for operation.

Each stage builds on the previous one, creating a structured path from design through installation and start-up to full facility testing and handover.

Commissioning uses a sequence of tests that progressively moves from individual equipment and systems to all facility. The scope expands through the successive commissioning levels (L1–L5).

FAT (Factory Acceptance Test)
Factory testing performed before equipment is delivered to site. FAT verifies compliance with the specification and basic equipment functionality.

SAT (Site Acceptance Test)
Testing performed after equipment has been delivered and installed, confirming correct installation, checking for transport or installation damage.

Pre-Functional Testing
Checks to confirm that systems are ready for start-up, including mechanical and electrical inspections, protection checks and verification that systems can be safely energized.

Functional Testing
Detailed testing of system operation under different operational and load scenarios.

Load Testing
Simulation of real operating loads, including the use of load banks for systems such as UPSs and generators, to verify system performance.

IST (Integrated Systems Testing)
Integrated testing of the facility to verify how all systems operate together under realistic operational and failure scenarios.

The L0–L6 commissioning levels provide a structured approach to the start-up and verification of Data Center systems. Each level corresponds to a specific stage of testing, quality control and preparation for operation.

L0 – Design & Planning
Preparation of the design, commissioning plans, technical reviews, requirements and procedures.

L1 – Factory Testing
Testing equipment at the manufacturer’s facility to verify quality and compliance with specifications before delivery to the site.

L2 – Installation & Pre-Startup
Installation and inspection of equipment on site, confirming that systems are ready to be energized.

L3 – System Start-up
Initial energization and start-up of installations, with preliminary checks before functional testing.

L4 – Functional Testing
Detailed testing of individual systems to verify performance, functionality and compliance with project requirements.

L5 – Integrated Systems Testing
Testing all of the facilities’ systems together to verify how they interact under realistic operational conditions.

L6 – Handover / Closeout
Final project closeout, completion of documentation, handover and confirmation of operational readiness.

Together, L0–L6 provide a structured sequence from design and planning through equipment and system testing to final handover.

Commissioning tests power, cooling, controls and security systems under operating conditions, including failure scenarios, before the facility goes live. It verifies that the Data Center infrastructure performs as designed, is resilient to failures and is ready for real-world operation.

For operators, commissioning provides confidence in stable operation from day one, reduces the risk of downtimes, provides complete documentation and operational procedures.

For investors, it assures independent verification of construction quality and compliance before handover, reducing the risk of failures, delays and financial losses while increasing the attractiveness of the facility to customers requiring high availability.

For general contractors and design teams, commissioning helps identifying design and installation issues during the project, reduces costly rework and brings structure to the handover process through testing, checklists and reporting.

Commissioning can also reduce operational costs by improving system optimization, increasing energy efficiency and providing clear as-built and testing documentation.

Commissioning helps identify errors and non-compliances early in the project, before they affect start-up or operation. This reduces the risk of costly changes, delays and unplanned downtimes.

When properly integrated into the project schedule, commissioning supports on-time delivery. Verifying system performance before handover can also contribute to lower maintenance costs, greater infrastructure reliability and more efficient operation throughout the facilities’ lifecycle.

We combine project experience with practical knowledge of Data Center infrastructure and its operation. We do more than providing consultancy – we actively participate in the delivery, testing and commissioning of Data Center facilities.

We use our own testing and measurement equipment, giving us more control over the commissioning process and allowing to identify potential issues faster.

Our team holds recognized industry certifications, including ATS Accredited Tier Specialist, CDCDP, CDCS and CDCP. We have been involved in the first Data Center certifications in Poland under Uptime Institute and ANSI/TIA-942 standards.

We deliver projects across Poland and Europe, combining knowledge of international standards with a practical understanding of local conditions and client requirements.

The Uptime Institute Tier Standards (Tier I–IV) provide a globally recognized classification system for Data Center resilience and availability. The system focuses primarily on the capability and redundancy of critical infrastructure, particularly power and cooling systems.

Tier I – Basic Capacity

Basic infrastructure with no redundancy. Failure or planned maintenance can result in downtime.

Tier II – Redundant Components

Includes redundant components, such as N+1, but retains a single distribution path. The risk of downtime during failures or maintenance remains.

Tier III – Concurrently Maintainable

Allows planned maintenance without shutting down the Data Center. Redundant components and alternative distribution paths support continuous operation.

Tier IV – Fault Tolerant

The highest level of resilience, designed to maintain operation despite the failure of individual components or systems.

ANSI/TIA-942 is an international standard defining requirements for the design and physical infrastructure of Data Centers. It covers site planning, architecture, electrical systems and cabling, mechanical systems, telecommunications, fire protection, cooling and security.

The ANSI/TIA-942 standard is developed by the Telecommunications Industry Association (TIA). Compliance is assessed by authorized certification bodies through reviews of design documentation and/or the completed facility against the requirements of the standard.

Certification provides an independent assessment of the facility’s compliance with the applicable requirements. ANSI/TIA-942 defines four Ratings based on the resilience and redundancy of the infrastructure:

Rated-1 – Basic availability

Basic infrastructure with limited redundancy. Planned maintenance may require systems to be taken offline.

Rated-2 – Partial redundancy

Selected infrastructure components have redundancy, improving resilience, although some maintenance activities may still require downtime.

Rated-3 – Concurrent maintainability

The infrastructure is designed to allow planned maintenance without interrupting Data Center operations.

Rated-4 – Fault tolerance

The highest Rating, with no single point of failure, full redundancy of the infrastructure and fault tolerance.

The documentation depends on the scope of the service. For commissioning projects, we provide documentation confirming the facility’s readiness for start-up and the compliance of system performance with project requirements and the client’s expectations. Following an audit, the client receives a detailed report covering the condition of the facility, identified non-compliances and recommended actions. For certification projects, we prepare the documentation required to demonstrate compliance with the relevant standard, including ANSI/TIA-942, EN 50600 or Uptime Institute requirements, with the process culminating in the relevant certification.

Without commissioning, there is a significantly biggest risk that design, construction or system integration issues will only be identified after the facility has entered operation. This can result in higher operating costs, unplanned downtimes, failures, financial losses and project delays.

For critical infrastructure such as Data Centers, even seemingly minor non-compliances can affect the reliability of the entire system. Commissioning reduces these risks through structured design reviews, construction quality checks, functional and integrated testing of the systems, providing the investor with confirmation that the facility is ready for safe, stable and reliable operation.