Articles Financial analysis and economic project evaluation FEASIBILITY STUDY AND FINAL DESIGNS: THE CITY OF ESMERALDAS MARKET SYSTEM PRE-FEASIBILITY, FEASIBILITY STUDIES, AND FINAL DESIGNS: THE MARKET SYSTEM OF THE CITY OF GUAYAQUIL DEFINITIVE SUTIDES ON PRE FEASIBILITY, FEASIBILITY AND DESIGNS: NEW SYSTEM OF PRODUCT COMMERCIALIZATION PERESIBLES FOR THE CITY OF QUITO (DQM). FEASIBILITY STUDIES, FEASIBILITY AND FINAL DESIGN FOR A NEW SYSTEM OF MARKETING IN THE PORT OF MANTA ECUADOR