Architecture design: In your opinion, what are the most common mistakes architects commit when designing a project?

the common mistake they do it, they forget there is another disciplines use the same bulding like Elec and specially mechanical

Many architects hurry with the concept development and discard so many influencing forces that need thorough study. Many of them take the program for granted and do little analysis with regard to the critical relationship between the program and the form and how a good form is created through responding soundly to the program.