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  • PublisherCIBSE
  • Product CodeTM61
  • Number of pages139
  • Publication DateAug 2020
  • ISBN9781912034529

TM61: Operational performance of buildings (2020)

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TM61: Operational performance of buildings (2020)

TM61: Operational performance of buildings is accompanied by three additional TMs dealing with various aspects of operational performance. These TMs are:

All four publications are available as a set here.


A major concern regarding the built environment is the performance gap between design and operation. This Technical Memorandum and its companions aim to provide detailed insights into operational building performance, not only to building services engineers but also other stakeholders, such as architects, contractors, client bodies, students, and users who have an influence on the design, construction, and facilities management outcomes.

A primary requirement to address the performance gap is the collection of operational performance data, which can be fed back to design teams to both diagnose issues with the current design but also to help ensure that lessons are learnt, and future designs improved.

There are many facets to the performance gap, not least the segmentation of disciplines involved in the building life cycle stages. Traditionally, designers, engineers, and contractors are all involved in the building development process, but disband once the building is physically complete, leaving the end-users with a building they are unlikely to fully understand. Gathering more evidence on both the performance gap and its underlying issues can provide insights into feedback mechanisms and prioritize principal issues. It can also help policy-makers understand the trend of energy use and indoor environmental quality and support the development of regulations. Finally, operational data are valuable to facility managers and building users in order to efficiently operate their buildings.

The body of knowledge, operational performance data and best practice recommendations presented in this series of publications build on the experience of several building performance evaluations carried out in recent years including the collaborative work between UCL and Tsinghua University — the ‘Total Operational Performance of Low Carbon Buildings (TOP)’ research project. The UK component of TOP, which was funded by the Engineering and Physical Sciences Research Council (EPSRC), led to performance evaluations of the case studies presented in this series of publications.


Topics covered include:

Energy performance

Design stage

Construction stage

Commissioning and handover

Performance in use (operation)

Indoor environmental quality (IEQ) performance

Performance evaluation approaches

Performance management hierarchies

Design stage

Construction stage

Commissioning and handover

Performance in use


Case Study A: Office

Case Study B: School

Case Study C: Hospital

Case Study D: Apartment block


Annex: Collaboration, alignment, information and performance


Authors: Dr Francesco Aletta (UCL Institute for Environmental Design and Engineering), Dr Edward Barrett (UCL Institute for Environmental Design and Engineering), Dr Roderic Bunn (Independent Consultant, WMEboom), Dr Esfand Burman (UCL Institute for Environmental Design and Engineering), Valerio Cappuccio (Lloyds Bank), Dr Lia Chatzidiakou (University of Cambridge), Karen van Creveld (UCL Institute for Environmental Design and Engineering), Prof Mike Davies (UCL Institute for Environmental Design and Engineering), Dr Mark Dowson (Buro Happold Engineering), Dr Chris van Dronkelaar (Buro Happold Engineering), Nishesh Jain (DesignBuilder Software Ltd.), Frankie Lack (Swan Housing Association), Prof. Jian Kang (UCL Institute for Environmental Design and Engineering), Dr Judit Kimpian (Architects’ Council of Europe) , Prof. Dejan Mumovic (UCL Institute for Environmental Design and Engineering), Dzhordzhio Naldzhiev (UCL Institute for Environmental Design and Engineering), James Outram (Hoare Lea), Dr Clive Shrubsole (Public Health England), Dr Samuel Stamp (UCL Institute for Environmental Design and Engineering), Dr Tin Oberman (UCL Institute for Environmental Design and Engineering), Prof Peter Raynham (UCL Institute for Environmental Design and Engineering), Dr Craig Robertson (Allford Hall Monaghan Morris), Chryssa Thoua (UCL Institute for Environmental Design and Engineering), Krishna Vasireddi (UCL Institute for Environmental Design and Engineering), Lorna Flores Villa (UCL Institute for Environmental Design and Engineering), Dr Catherine Willan (UCL Energy Institute), Dr Nici Zimmermann (UCL Institute for Environmental Design and Engineering)

TM61–64 Co-ordinating Editors: Prof Dejan Mumovic (UCL Institute for Environmental Design and Engineering), Dr Esfand Burman (UCL Institute for Environmental Design and Engineering), Dzhordzhio Naldzhiev (UCL Institute for Environmental Design and Engineering)

TM61–64 Steering Committee: Prof Mike Davies (UCL Institute for Environmental Design and Engineering), Dr Anastasia Mylona (CIBSE), Richard Smith (Independent Consultant), Ian Taylor (Feilden Clegg Bradley Studios), Eimear Moloney (Hoare Lea), Prof Paul Ruyssevelt (UCL Energy Institute), Alasdair Donn (Willmott Dixon), Dr Mark Dowson (Buro Happold Engineering)