Abstract: A computer-implemented construction management system for enabling the performance of work tasks conducted at a remote project site like a construction site is provided by the invention. The system comprises a data interface for providing a communication link between a remote computer device used by the field worker at the project site and a central computer located at a central hub. Scanning a scannable indicia posted at the project site by means, e.g., of a smart phone or tablet, a field worker may quickly and readily gain access via a plurality of graphical user interface screens in the associated software to an organized set of documents, information, and electronic images associated with project tasks to be conducted at the project site.

Abstract: An electronic device for determining a level of toner volume in a replacement toner cartridge used in a printing device comprises a communication element, a memory element, and a processing element. The communication element transmits a request to the printing device to provide data regarding the replacement toner cartridge and receives the data. The data includes a current level of toner volume and a current printed page count. The memory element stores the data received from the printing device. The processing element is in communication with the communication element and the memory element. The processing element is configured to determine one of a plurality of sequential phases of a usage cycle of the replacement toner cartridge corresponding to a value of the current level of toner volume and determine a corrected level of toner volume using one of a plurality of equations selected according to the phase.