Abstract: A system for managing labor and materials on a construction site includes a database stored on a computer-readable storage medium, a field-application module in communication with the database, and a vendor module in communication with the database. The field-application module receives information related to materials, labor, and/or services from a data-entry device and stores the information in the database. The vendor module receives vendor information and stores the information in the database. When the field-application module receives a bid request from the data-entry device, the vendor module transmits the bid request to a plurality of vendors. Next, when the vendor module receives bids from one or more vendors, the field-application module transmits one or more of the bids to the data-entry device. Finally, when the field-application module receives a purchase order from the data-entry device, the vendor module transmits the purchase order to the relevant vendor.