text: PROCUREMENT_METHOD_TYPE = 'esco'
  ROUNDS = 3
  NPV_CALCULATION_DURATION = 20 # accounting period, years
  DAYS_IN_YEAR = 365
  MAX_CONTRACT_DURATION = 15
  
  BIDS_KEYS_FOR_COPY = ("bidder_id", "amount", "time", "contractDurationDays",
                        "contractDurationYears", "yearlyPaymentsPercentage")