 The National Construction Code, also known as the NCC contains mandatory performance requirements that set the minimum level of performance that buildings, building elements and plumbing systems must achieve. A performance solution is an option which may be used to satisfy these performance requirements. To assist in the development of performance solutions, the ABCB has produced this guidance document. It can be used for both simple and complex performance-based designs, with the length and complexity of the process being proportional to the complexity of the design. The guidance document is presented as four distinct steps. Step one, the brief. Developing a brief requires project stakeholders to collaborate and agree on a pathway for the design process to follow. This includes selecting which of the assessment methods as outlined in the NCC is to be used. This step is critical as it sets the agreed acceptance criteria used to assess the solution against the NCC performance requirement. Step two, analysis or testing. This step involves analysis, modelling or testing to meet the agreed acceptance criteria set out in the brief. Step three, evaluation. Once the analysis, modelling or testing is complete, the results are collated and evaluated to determine if the acceptance criteria have been met. If they are not met, then step two may need to be repeated until the acceptance criteria are satisfied. Step four, reporting. The final report should demonstrate that compliance with the NCC performance requirement has been achieved, based on all of the previous steps. This four-step process provides an outline to assist in developing performance solutions. For more details, refer to the full guidance document which has been supported by a number of industry groups and can be found on the ABCB website.