Dynamic task management processes and systems are provided, whereby tasks are assigned to workers discretely, in response to worker-originated requests, on a real-time basis. Tasks are extracted from an aggregate thereof, scheduled into one or more queues, then “pulled” by workers for execution. Comprehensive data for performing each task are monitored, as are worker skills and availability. Each task is matched to an appropriate worker, the assignment being adjusted or modified automatically, to the extent required, to satisfy certain predefined temporal and/or spatial criteria. When a worker signals completion of an assigned task, the next discrete task in the queue matching the worker's skills and/or availability is pulled from the queue and assigned. The invention is useful for managing warehouse and inventory operations, and specifically, the scheduling and assignment of pick tasks among warehouse pickers, for example, in connection with e-commerce order fulfillment.