<prompt> Translate the following text to EnglishUtafiti wa FFC unaonyesha kuwa tahadhari inapaswa kuzingatia ukaguzi wa miundo wakati wa awamu ya mipango ya dhana na muundo, ambapo uwezo wa kuathiri utendaji wa mwisho na gharama ya mradi ni kubwa zaidi.  <response>: The FFC study notes that attention should be focused on review of designs during the conceptual planning and design phases, where the ability to influence ultimate functionality and cost of the project is the greatest. 