TOP DOWN APPROACH TO DEVELOP A STRUCTURE FOR SUSTAINABILITY ASSESSMENT SYSTEMS

Transcription

1 TOP DOWN APPROACH TO DEVELOP A STRUCTURE FOR SUSTAINABILITY ASSESSMENT SYSTEMS Thomas Lützkendorf KIT - Karlsruhe Institute of Technology (former Karlsruhe University), Germany BSA 2012, Porto

2 Targets - to develop a systematic structure for sustainability assessment of buildings with special focus on the validity of sustainability indicators - to stimulate further development of assessment systems in a way that maintains the autonomy of existing systems, while bringing them closer together in terms of content 2

3 Lead market initiative in EU Sustainable Construction Develop voluntary performance targets to enable the implementation of incentives and other policy measures to promote sustainable buildings and construction practices Develop European standards that allow taking into account sustainability aspects in construction design. Define the framework for technical assessment adapted to a rapid certification of innovative products to sustainability criteria. Define a framework, assessment method and benchmarks for assessing the sustainability performance of buildings and of the construction value chain Expand the scope of Eurocodes in order to integrate other sustainability aspects in construction design, such as energy and environmental aspects. Adopt the Construction Products Regulation, providing for better procedures to obtain European Technical Approvals and for better recognition in Member States for sustainability issues Annex I to the communication from the commission to the council, the European Parliament, the European Economic and Social Committee and the Committee of the Regions (COM(2007) 860 final SEC(2007) 3

4 European standard EN

5 IMPORTANCE OF TECHNICAL & FUNCTIONAL PERFOR. European standad EN

6 Current situation Activities (e.g.): Assessment systems (e.g.): SBA BREEAM UNEP SBCI BNB/DGNB UNEP FI PromisE iisbe HQE LEnSE Valideo Perfection CASBEE Open House LEED SuPerBuildings GPR ISO TC 59 SC 17 Total quality CEN TC 350 SB tool CZ.. SB tool (iisbe) Minergie.. Do we need one system more? 6

7 SuPerBuildings WANTS TO: Develop recommendations for a next generation of assessment methods and tools Deduce the structure from the areas of protection / safeguard subjects = top down approach Integrate functional and technical quality Avoid double counting while capturing multi-effects Separate object-related and process-related indicators Separate indicators that specify and evaluate a building and its site ( property ) from those that evaluate its location 7

8 PROPOSED top-down APPROACH WHAT ARE THE ADVANTAGES OF A TOP DOWN OVER A BOTTOM UP APPROACH? Existing indicator-driven bottom-up approaches (A) often do not cover the full range of issues, may be overlapping and may be of different value in terms of significance. A Using a top-down approach will ensure that the assessment is comprehensive and treats all sustainability- related issues adequately B 8

9 The concept of Areas of Protection 9

10 AREAS OF PROTECTION / SUBJECTS OF CONCERN WHAT ARE THE SUBJECTS OF CONCERN IN THE CONTEXT OF THE SUSTAINABILITY ASSESSMENT? broadly equivalent to the term areas of protection or safeguard subjects commonly found in LCA the subjects of concern should follow the three dimensions of sustainability: the environmental, economic and social dimension. at a generic level each dimension can be seen in terms of value and stability. 10

11 Subjects of concern /areas of protection 11

12 THE COOKING RECIPE How do we arrive at a structure starting from the subjects of concern? THE COOKING RECIPE : Defining the subjects of concern Defining goals Translating subjects of concerns and goals to the building level Defining themes/ high-level groups / groups of indicators Defining criteria and indicators Defining assessment requirements Setting performance levels and benchmarks Weighting Communicating (out-puts) 12

13 OVERALL CONCEPT 1. subjects of concern value stability 2. building level subjects of concern Indicators indicators indicators Stakeholders 13

14 A) DEFINING SUBJECTS OF CONCERN AND GOALS FOR A SUSTAINABILITY ASSESSMENT 14

15 B) THE BUILDING AND THE ASSESSMENT 15

16 How to subdivide the 3 dimensions of sustainability? Environmental performance Economic performance Social performance the global environment the national / regional environment the local environment the micro-location the economic interests of tenants the economic interests of landlords the economic interests of owners the economic interests of society the social concerns of individuals the social concerns of the neighbourhood the social concerns of communities the social concerns of society 16

17 CORE LIST OF INDICATORS ISO GWP ODP Resource consumption Life cycle cost 17

18 SPECIFY AND EVALUATE THE FUNCTIONAL AND TECHNICAL QUALITY TECHNICAL QUALITIES ARE: structural stability fire protection sound proofing moisture proofing. FUNCTIONAL QUALITIES ARE: quality of floor plans accessibility functionality / serviceability OPTIONS FOR FEATURING TECHNICAL AND FUNCTIONAL QUALITIES ARE: Requirements regarding the technical and functional quality as part of defining the functional equivalent. Defining and assessing the technical and functional performance 18

19 FUNCTIONAL QUALITY AS PART OF SOCIAL PERFORMANCE? SUPERBUILDINGS PROPOSES: Substantial overlaps between functional and social qualities exist; therefore functional quality can be integrated into social qualities. Technical quality is to be assessed, but the result is to be kept separate from the main assessment. 19

20 DISTINGUISHING BETWEEN BUILDING- AND PROCESS-RELATED INDICATORS Building performance of the building as physical entity: Technical quality Environmental performance Economic performance Social & functional performance Quality of processes accompany the life cycle of the building Planning/ designing Construction Operating the building 20

21 POSSIBLE OPTIONS: HOW TO DEAL WITH LOCATION? Site selection and characteristics of the location are treated in isolation from the sustainability assessment of the building (analyzed but not assessed) The site selection is treated as part of process-related qualities and is analyzed and assessed alongside other process-related issues. The location characteristics as such will be recorded, but not assessed. The location characteristics will be recorded and assessed in isolation to the building characteristics. The result will be presented separately. Location characteristics will be recorded and assessed. The assessment results does contribute to the over-all score, but is weighted appropriately. 21

22 B) THE BUILDING AND THE ASSESSMENT 22

23 C) OUTPUTS 23

24 PROVIDING ASSESSMENT RESULTS Purpose As a basis to communicate the aims and objectives regarding the project stakeholder As a checklist for designers designers specialist consultants As basis for informing third parties Surveyors As basis for informing other third parties estate agents banks As a selling point in a competitive market Buyers tennants Clients designers, specialist consultants, project managers planning authorities (local authorities) Fu lly ag gr Pa rti all x y As se ss m ac tu al pr valuation surveyors x x x x As an indicator for corporate social Senior managers x x responsibility and information source for relevant reporting As a tool in the tender process in green procurement Procurers (in particular in public procurement) As a tool for quality assurance in green Procurers (in particular in public procurement (in particular public procurement) procurement) x x x x x x x x x x 24

25 25 FULL PICTURE

26 Recommendations (sample) The main indicator categories are determined by the main categories of the subjects of concern (areas of protection): the environmental, social and economic dimensions of sustainability. Functional and technical qualities need to be considered in addition. It is recommended to ensure a clear distinction between object-related (e.g. energy performance) and process-related (e.g. energy monitoring) indicators. It is important that as part of the assessment results the functional equivalent is clearly stated. 26

27 Characteristics of a next generation Top-Down approach to defining assessment criteria, starting from the areas of protection) Accounting for all three dimensions of sustainability (economic, environmental and social aspects) incl. technical and functional performance Clear separation of building specific qualities and process specific qualities (design, construction, operation) Accounting for the full life cycle of the building Use of quantitative methodologies (LCA & LCC) Taking into account the current state of European and international standardisation (e.g.. ISO TC 59 SC 17 und CEN TC 350). 27