To illustrate the need for proof of presence, consider these tasks:
- A security guard checking locked doors and fire extinguishers are full.
- A care-taker making their patient rounds while in-facility or remotely.
- An employee or subcontractor disinfecting surfaces.
Because of lower costs, businesses use barcodes predominantly for tracking these tasks. Proof of presence is valuable when using GPS tracking of the scanning device. Then, the administrator knows that at least the app user was in the general vicinity.
However, consider high-rises with these tasks on many floors. And, consider having many locations close together. GPS will likely not give accurate enough results in either case.
In these examples, reading the NFC tag’s UID affixed at each location will give a much better proof of presence. You could even enable photo-taking and a signature.