Threshold-based sensing during commerce session at a physical location

A computing system comprising:

• a sensor for sensing one or more parameters of a session at a physical location;
• a processor coupled to the sensor;
• and
• a memory coupled to the processor, the memory storing processor-executable instructions which, when executed, cause the processor to:
• detect, based on an output of the sensor, engagement with an item during the session at the physical location;
• obtain a value parameter for the item;
• retrieve a threshold from stored threshold definition data;
• evaluate the value parameter using the retrieved threshold;
• and
• based on a result of the evaluation, selectively trigger a notification at a device associated with the threshold definition data.