Incomplete, Ambiguous and Contradictory Requirements

Ada quote menarik nih dalam tahapan pembuatan software, stage planing (the source of this quote is here):

... Customers typically have an abstract idea of what they want as an end result, but not what software should do. Incomplete, ambiguous, or even contradictory requirements are recognized by skilled and experienced software engineers at this point. Frequently demonstrating live code may help reduce the risk that the requirements are incorrect...

Heuheu,, bener banged tuh quote.. harus bener-bener berlatih memahami software seperti apa yang diinginkan user. Mungkin readers ada yang memiliki pengalaman menarik?