A local subcontractor demands the foreign contractor for a work contracted by the government entity of Ecuador in charge of developing electricity generation projects. The purpose of the subcontract was mainly the construction of civil works of three mini hydroelectric plants. The matter of controversy was specifically about: i) the costs related to greater permanence in works; ii) additional costs for overcarriage of materials; iii) withholdings and discounts made; iv) works not accepted due to the alleged rejection of the owner; v) additional work performed; vi) readjustment of prices; vii) financial cost incurred due to payment arrears; viii) unearned advance payment, according to the defendant. Edmundo acted as a financial-accounting expert appointed by the Arbitral Tribunal, determining an amount close to US $ 10 million for the different concepts evaluated.