Overview
System performance: *SP-010: The system must enable bulk printing of invoices for all customers at the beginning of the next month. *SP-020: The system shall contain a visible list of accounts. *SP-021: Each contract can have several personal accounts. *SP-022: One customer can have several contracts. *SP-030: The system must enable the authorized person to choose accounts for which the invoices will be printed. *SP-040: The system must enable the authorized person to enter date ranges for which the invoices will be printed. *SP-050: The system must automacically create a hot-bill and a regular bill when the customer closes the contract. *SP-051: The system must display and enable to print all hot-bills at the end of each month. *SP-052: The hot bill report must contain these pieces of information: System administration: *SA-010: Only authorized person can maintain the system. *SA-020: The authorized person must have his/her personal account. *SA-021: The personal account can be accessed through a nick/name and password.