Scenario

We must identify persons and also associate objects with them. This is for a very large cerebral palsy center for children that provides various services, some in different buildings (there are 6 of them, though all within a 4 block radius).

The kids are transported to (and from) the center by various private services, and there is a lot of confusion about where and when the therapies take place (made worse by the pandemic, as professionals are constantly canceling shifts). Depending on the day, time, and the varying degrees of severity of the children's condition, the therapies are conducted at one of 6 locations, which also causes traffic chaos in these four blocks.

Proposed solution

To avoid this, we have developed a digital identification system with a very simple app where drivers can simply scan a code and get information about the exact location and time the children need to be picked up. We think this solution has a lot of scalability for further subsets of solutions, not only for drivers, but also parents and therapists.

Since the information is not sensitive and no one is going to hack it, the format of the code is not particularly important to us. We came up with 3 possible formats: QR, barcode or a custom code that would allow us to be more "playful", like a QR, but with glyphs automatically generated from a library (see a pretty basic example below)

The question

Are there any special considerations as to why we should prefer one method or the other? My team prefers the QR, because it is standardized, I prefer the custom solution because ... well, because it's custom and gives us esthetic and emotional design options. The health center prefers the barcode, but they do not really care as long as it works.

So is there something special to consider, or am I missing something? Or is there another method we should consider that works better or combines the best of these methods?

What are the considerations when dealing with different digital identification systems?