Information about the process of price quotation in design projects was collected through in-depth interviews with experts in the field and a survey of design professionals. Content analysis was applied to the transcripts of 13 interviews and revealed four dimensions whose inclusion in the process adds robustness to time estimates during the process of price quotation on design projects. The correlations among these dimensions were evaluated through the application of a survey that resulted in 427 valid responses. The results indicated that the entire professional community reinforced the need to observe them to ensure greater assertiveness in the studied processes.