To reach the Task objectives four Subtasks have been defined.

SUBTASK A - CASE STORIES
(SUBTASK LEAD COUNTRY: DENMARK)

Different low energy solar buildings are investigated and documented in this subtask. The objective of Subtask A is to provide the knowledge needed for guidelines, methods and tools, which will be developed in other subtasks. This was done by evaluating and documenting a set of buildings designed using the "whole building approach". Both the processes used in the design of the buildings and the resulting performance were evaluated.

The results of these studies have been documented in a report "Description of Case Stories" and a booklet Examples of Integrated Design - Five Low Energy Buildings Created Through Integrated Design.

SUBTASK B - DESIGN PROCESS GUIDELINES
(SUBTASK LEAD COUNTRY: SWITZERLAND)

The main objective of Subtask B is to develop design process guidelines suitable for the early stages of design, as the integrated design process approach is particularly important in these stages. The guidelines will both deal with the make up of the design team and the interaction between members of the design team, with the information required by the team, and with the ways of designing the building as a system, where the different low energy and solar technologies to be used are integral parts of the whole.

The main results of Subtask B are the development of design process guidelines (i.e. the 'Integrated Design Process Guide' and the 'Navigator').

SUBTASK C - METHODS AND TOOLS 
(SUBTASK LEAD COUNTRY: USA)

The main objective of Subtask C is to develop methods and tools to be used by the designers when doing trade-off analyses between different low energy and solar technologies. As designers, builders and owners optimise against a large number of criteria, such as energy use, comfort, cost, aesthetics, environmental impact, etc., a multi criteria decision making method was developed that stimulates discussion within the design team about these trade-offs to find the optimal design. The method also is translated into a computer based tool. To assist the design team with respect to energy analyses throughout the design process the application of an energy calculation method is recommended that can be used from the very first stages on. Though the energy calculation tool Energy 10 is not developed within the Task it does fit the objective quite well and therefore national parameter sets were defined which makes the tool applicable for a wider target audience.

The main results of Subtask C are the MCDM-23 method, MCDM-23 tool and Energy 10.

SUBTASK D - DISSEMINATION AND DEMONSTRATION
(SUBTASK LEAD COUNTRY: THE NETHERLANDS)

The main objective of Subtask D is to disseminate the results of the work of the Task to the building community. Dissemination took place by setting up a web site, through which methods, tools and publications are available. 

Also highly energy efficient demonstration buildings have been developed by putting the integrated design process into practice. The booklet The Integrated Design Process in Practice - Demonstration Projects Evaluated goes into further detail.