Uptime Institute Tier Certification (TCDD, TCCF, TCOS)

Overview

The page describes Uptime Institute certification as three consecutive stages: Tier Certification of Design Documents (TCDD), Tier Certification of Constructed Facility (TCCF) and Tier Certification of Operational Sustainability (TCOS). It stresses that the Tier Standard is technology-neutral and vendor-neutral and accommodates local codes. The certificate therefore verifies that the standard was applied, not that particular equipment or layouts were used; outcomes such as redundancy and fault tolerance are tested, brand choices are not. TCDD reviews the mechanical, electrical, structural and site elements against Tier Standard: Topology.

It is the entry ticket for what follows, because TCDD is a prerequisite for TCCF. A time limit applies: design awards issued after 1 January 2014 expire two years after the award date. A project that stalls between drawings and construction can lose its certificate, so the renewal date belongs in the project schedule. TCCF rests on the fact that paper designs and built sites diverge. The page notes that construction projects typically involve more than 50 disciplines, which is the argument for as-built verification.

TCOS then moves from hardware to behaviour: it assesses operational behaviours and risks and rates the site Gold, Silver or Bronze, using criteria from the Operational Sustainability standard. The performance-based philosophy has a practical consequence: any design reaching the required redundancy and fault-tolerance outcomes is acceptable, including modular, Open Compute Project and novel power or cooling concepts. The limit of the source is that it is a promotional-level overview. Detailed criteria and test procedures sit in the standards themselves, so this page gives a roadmap, not a checklist.

Key points

1. Three stages: TCDD (design), TCCF (constructed facility), TCOS (operational sustainability)
2. TCDD awards issued after 1 Jan 2014 expire two years after the award date
3. TCDD is a prerequisite for TCCF
4. TCDD reviews mechanical, electrical, structural and site elements against Tier Standard: Topology
5. Construction projects typically involve more than 50 disciplines, motivating as-built verification
6. TCOS ratings are Gold, Silver or Bronze
7. The standard is performance-based: modular, OCP and novel power/cooling designs are acceptable if they meet the outcome requirements

Using it in design

• Add a three-gate certification pathway to the project plan, starting with a TCDD-like design review before construction drawings freeze
• Put an as-built verification and integrated 'pull-the-plug' test gate (TCCF-like) in the commissioning module
• Define a separate operations-readiness gate covering staffing, maintenance, training and procedures (TCOS-like)
• When a user records a design certificate, compute 'designCertValidUntil' as award date + 2 years and raise a reminder

Who should read it

Project managers, design engineers and facility owners pursuing Tier certification.

Related standards

• Uptime Tier Standard: Topology
• Uptime Tier Standard: Operational Sustainability
• ASHRAE Guideline 0

Publication details

Authors

Uptime Institute

Publisher

Uptime Institute

Year

2026

Document language

English

Source type

Industry body

Access

Free to read

Licence

Copyright retained; citation only — the publisher’s terms apply to the original document

Citation