Why commissioning matters more than handover

Method question

What does a completed residence still need to prove before it is released for use?

One-sentence answer

Handover and commissioning answer different questions

Handover transfers possession and documents. Commissioning tests whether the installed systems, controls and operating routines meet the owner’s brief under stated conditions, records what failed, verifies the correction and prepares the team to operate the residence.

Handover asks

• Are the documents present?
• Have keys, warranties and manuals been transferred?
• Has the contractor declared the work complete?
• Has ownership or custody changed?

Commissioning asks

• What was the owner’s requirement?
• What target or acceptance criterion was agreed?
• Was the installed system inspected and tested?
• Under which conditions was it tested?
• What failed?
• Was the correction retested?
• Can the owner and operating team use the system?
• What remains unresolved or seasonal?

A residence can be handed over without those questions being closed.

Commissioning begins with the owner’s brief

Established commissioning principle Evidence-based recommendation

Testing at the end cannot repair a missing requirement at the beginning.

Commissioning should start by recording:

• owner priorities;
• intended operating modes;
• protected rooms and critical systems;
• project targets;
• evidence classification;
• specialist responsibilities;
• tests and instruments;
• witness points;
• data and privacy boundaries;
• opening criteria;
• aftercare period.

Those requirements then enter design reviews, tender documents, purchase orders, mock-ups, inspections and training.

The five-stage cycle

1. Pre-occupancy

Timing Late construction to handover.

Purpose Lock intent, verify installation, collect baseline evidence and close critical issues before opening.

Typical outputs

• owner requirements;
• commissioning plan;
• instrument and sensor register;
• witness logs;
• mock-up records;
• empty-building baseline where useful;
• opening-readiness list.

2. Opening

Timing First 7 to 14 days.

Purpose Confirm usability, controls, training and obvious defects under real operation.

Typical outputs

• opening issues log;
• rapid-fix list;
• training completion;
• first occupied observations;
• staff and owner questions.

3. 30-day review

Timing Day 21 to 45.

Purpose Catch early operational drift before workarounds become permanent.

Typical outputs

• 30-day tuning memo;
• control and alarm adjustments;
• staff-routine corrections;
• defect closure review;
• updated Building Passport entries.

The 30-day review forms part of the Full Development Mandate baseline.

4. Seasonal review

Timing Wet-season and drier-season campaigns where the project question requires them.

Purpose Test assumptions that cannot be closed during one opening condition.

Typical outputs

• seasonal trend review;
• revised setpoints and modes;
• moisture, rain, noise or comfort corrections;
• updated operating protocol.

Seasonal review remains a separate scope unless expressly included.

5. Annual learning

Timing Approximately 12 months.

Purpose Review faults, maintenance, utility patterns, user experience, evidence grade and what should change in the next project.

Typical outputs

• annual review;
• Building Passport update;
• maintenance improvement plan;
• evidence-grade decision;
• publication or non-publication decision.

A test needs an acceptance criterion

Established commissioning principle

A test is not simply turning a system on.

A useful script records:

• the requirement;
• the mode and preconditions;
• the test method;
• the instrument or observation method;
• the person responsible;
• the expected result;
• the actual result;
• the deviation;
• the corrective action;
• the retest;
• the accepted exception, if any.

Without an acceptance criterion, a demonstration can look successful while failing the owner’s actual brief.

Commission the failure states

Evidence-based recommendation DALLEAU project method

A residence should be tested not only during the ideal scene, but during the conditions that create operational risk.

Examples include:

• power loss and restoration;
• internet or cloud loss;
• failed sensor;
• manual override;
• blocked or slow drain;
• high outdoor humidity;
• heavy rain;
• door or window left open;
• filter overdue;
• staff reset;
• owner account transfer;
• leak alarm and shutoff;
• equipment fault and escalation.

The project should record what continues, what stops, what fails safe, what needs human action and how the operator recognises the condition.

Training is part of verification

Established Soft Landings and operations principle

A system is not ready because the specialist can operate it during handover.

The owner and staff need to understand:

• normal modes;
• manual override;
• alarms and priorities;
• what must not be silenced;
• cleaning and maintenance;
• who receives escalation;
• what to do during outage or fault;
• where the current documents live;
• how to record an issue;
• which changes require specialist review.

Training should be witnessed, recorded and repeated when key staff change.

Owner’s Control Report and Building Passport are not the same object

Owner’s Control Report

The decision layer:

• owner objectives;
• material risks;
• specialists;
• hold points;
• evidence status;
• deviations;
• approvals;
• accepted residual risk.

Building Passport

The asset-memory layer:

• drawings and revisions;
• models, products and warranties;
• concealed-work evidence;
• controls and account custody;
• test records;
• settings and backups;
• maintenance schedules;
• training;
• incidents and changes;
• POE and publication permissions.

The two systems link to each other but should not be collapsed into one unreadable archive.

What commissioning can show

It can show that:

• a system was tested against a defined requirement;
• the test conditions and methods were recorded;
• faults were identified and retested;
• agreed modes and overrides worked at the time of test;
• the operating team received training;
• unresolved seasonal or lifecycle questions remain visible;
• later POE can compare intent with actual operation.

What commissioning cannot show

It cannot by itself establish that:

• a residence improves sleep, cognition, stress or longevity;
• one test represents every room, user and season;
• future maintenance will always be performed correctly;
• external noise, weather, vendors or neighbourhood conditions will remain unchanged;
• no future fault will occur;
• the building complies with a regulated requirement without the relevant authority or appointed professional basis;
• one project result is a universal rule.

When independent or specialist review is required

Independent or subject review is required when:

• the acceptance criterion belongs to a regulated discipline;
• life safety or statutory compliance is involved;
• DALLEAU has a commercial interest in the result and the public claim is strong;
• the method requires calibrated specialist instruments;
• the interpretation involves acoustics, lighting, moisture, thermal modelling, cybersecurity or healthcare-related adaptability;
• a result will be used publicly as evidence;
• the owner requests independent verification.

DALLEAU may coordinate, witness and preserve the evidence. It does not silently assume a specialist’s sign-off.

Data quality and privacy

Commissioning and POE should collect the least intrusive signal that can answer the building question.

The record should distinguish:

• raw data;
• cleaned data;
• reported data;
• missing or offline periods;
• abnormal events;
• sensor model and location;
• calibration or comparison method;
• occupant and weather context;
• changes made during the monitoring period.

Room and system evidence should be preferred over person-level histories. Raw private residential data remain internal unless a separate permission, anonymisation, evidence-grade and legal-privacy review authorise a narrow public extract.

Unresolved questions

• Which commissioning tests should be mandatory across every Full Development Mandate?
• Which tests require an independent specialist rather than a DALLEAU witness?
• How should instrument quality and calibration be scaled to the claim being made?
• What is the minimum useful wet-season review for each residence type?
• How should staff turnover trigger retraining and re-verification?
• When should a 30-day issue become a protocol revision rather than a project-specific correction?
• What evidence grade is required before a narrow commissioning result becomes a public Applied Note?

Sources

The source finding and DALLEAU's residential interpretation are kept separate. Links open the original publisher or authority record.

1. The Commissioning Process and commissioning requirements for new buildings and systems

   Authoritative guidance. Commissioning from owner requirements through acceptance, documentation, training and operation. Limit: Permanent performance under every future condition or a clinical human outcome.

2. Lessons learned from 20 years of CBE's occupant surveys

   Growing evidence. The value and limits of structured occupant feedback across many building surveys. Limit: A causal person-level outcome or direct transfer from offices to a private residence.

3. Post-occupancy evaluation in residential buildings: a systematic literature review of current practices in the EU

   Growing evidence. A synthesis of residential post-occupancy evaluation practices and methods. Limit: One universal POE method or a guaranteed project-performance result.

4. Enhanced Air Sensor Guidebook

   Authoritative guidance. Planning, selecting and interpreting air-sensor measurements. Limit: Replacing calibrated professional instruments or inferring a medical outcome.

Related content

• Protocol: Performance Commissioning and Post-Occupancy Learning Plan
• Protocol: Building Passport and Data Stewardship Plan
• Methods Note: How DALLEAU reads evidence for private residences in Bali
• Work: future Applied Notes and commissioning evidence when separately approved

Closing

Plan the evidence before the work is hidden

A residence is easier to verify when the owner’s requirements, test methods, hold points and aftercare are designed into the project.