Computational tools have redefined the architectural design practice, with respects to the environmental performance of buildings, since the decade of 1990. However, the environmental assessment of the design of buildings with the use of computer simulations is a process and, for this reason, do not guarantee the development of building designs adequate to the local climate. For this purpose, the environmental architectural approach, considered here, is the one in which the environmental adequacy is the result of the maximization of passive strategies, characterizing the architectural practice known as Bioclimatism and configuring the so-called Environmental Building. The efficient application of design parameters in the environmental adequacy of architectural requires the understanding of the specificities of the climatic context and of the consequent role of each design parameter in the interactions between internal and external environments. The objective of this work is a methodological proposal of qualifications of the design process for the environmental adequacy of buildings during the architectural conceptual phase, by means of parametric analysis and computer simulations, encompassing aspects of thermal performance and daylight. Examples of the application of parts of this method demonstrate the informative role of analytical studies in the creative architectural process, offering a range of design solutions of adequate performance.