1. A method for verifying completion of a task, said method comprising: obtaining location coordinates of at least one location sensor within a work cell, the at least one sensor affixed to a tool used to operate on a feature of a structure to be assembled; generating a virtual object locus based on the location coordinates of the at least one location sensor, the virtual object locus corresponding to a computerized schematic of the structure to be assembled and representative of all possible locations of an object end of the tool within the work cell; and identifying one of a plurality of candidate features as the most likely to be the feature operated on by the tool based on a probability calculation for each of the candidate features that each respective candidate feature is the feature operated on by the tool.