Optimized nZEB – process map

The new CRAVEzero Report presents a manual of the “Interactive Life Cycle Process Map” (LCPM) developed within the CRAVEzero project. The process map connects all phases for the entire project lifecycle from the urban planning to design, operation and end of life phase. As a main result, this report also comes along with a downloadable “life cycle tracker tool”, an easy-to-use Excel file with VBA macros that combines project roles, actions, and design responsibility matrix. It is based on the experience of the whole consortium in the area of holistic project management with a focus on integral building planning of nZEBs. It gives support on how key performance parameters to achieve successful nZEBs should be prioritized and can be tracked along the whole life cycle process. It can be downloaded here:

Download the full report here


Process Tracker Tool:

Process Map:

Process Map:

Actions, stakeholder-relations, pitfalls and bottlenecks, as well as the required goals, are pointed out in detail. Considering the importance and the complexity to reach nZEB-standard in a cost-optimal way for all the different stakeholders, multiple actions are required. These are, however missing in the standard planning process. This report provides a practical methodology to achieve the best conditions towards cost-optimal nZEBs in the whole planning, construction and operation process considering all relevant decisions, co-benefits, involved players as well as related cost reduction potentials. A process map that connects the entire project lifecycle for design, planning, operation and end of life phase accompanies this report. This process map is a workflow that points out cost reduction potentials through all the stages of the process where all the different parts are linked to providing summaries and reports to the decision-makers in leadership roles.

Process Map:

main additional advantages of integrating the “CRAVEzero process” into
standardized building processes are listed as follows:

  • Reduce risks
  • Speed-up construction and delivery
  • Control costs and energy performance
  • Foster integrative design and make optimal use of team members’
  • Establish measurable success criteria


Process Map:

Stakeholder related processes

Figure1 Stakeholders’ time expectancy of a nZEB project

In order to be able to optimise existing processes, technical qualifications, actions to be taken and roles must be known and tasks and functions of the stakeholders assigned. The assessment of the process for nZEBs depends strongly on the perspective. Building owners, investors, tenants, the construction industry, providers of energy efficiency solutions and planners have different interests and are involved in different phases in the life cycle of buildings. There is a general lack of understanding, transparency and uniform methods when it comes to the overall process of nZEBs.  Which costs and time horizons are significant for different actors and to what extent?

Figure2: Stakeholders’ influence in nZEB life cycle phases


nZEB Processes

The influence on the process decreases while the costs increase during the life cycle of a nZEB

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In addition to legal and urban boundaries, buildings are essentially defined by the client. Owners or investors want to construct or renovate buildings for a specific purpose. Also, the buildings technical quality and the comfort standard have to be achieved within project specific budget limitations. Architects and specialised planners translate the client’s ideas and wish into real plans and are responsible for the appropriate execution of the building project. Construction companies and craftsmen from numerous different disciplines are involved in constructing the building.