Abstract: A computer system automatically monitors and logs edits made to a digital document. The system calculates statistics from the log to produce an assessment of the editor's productivity. The system uses this assessment, in combination with assessments of other editors, to generate behavioral metrics which indicate correlations between editing behaviors and productivity. The behavioral metrics are used to identify the relative contribution to efficient editing of different editing behaviors. Such information about individual editing behaviors is used to evaluate the productivity of individual editors based on their editing behaviors, to identify behaviors which individual editors could adopt to improve their productivities, and to identify changes to the editing system itself for improving editor productivity.