Bag-and-Tag Routine vs. Two-bucket sorting pass
Bag-and-tag happens at the moment of collection; sorting passes are what you do later to separate keepers from maybes.
Bag-and-Tag Routine vs. Photo-first finds workflow
Photo-first captures context before pickup; bag-and-tag preserves that context after pickup.
Bag-and-Tag Routine vs. End-of-site cleanout
Cleanout is packing up; bag-and-tag is the process that prevents mixed, unlabeled material in your pack.