Taking a book and bringing it back
The main loop of the product. No account anywhere in it.
1
passerby, no account
curator, signed in
the system
passerby
Standing at the box. Scans the QR code taped inside the lid
↓
↓
↓
passerby
Offered a reminder. Types an email, or skips it
2
↓
system
Flips the copy to out, stamps the date, shows it to everybody
immediately
↓
only if they gave an email
Sends
the receipt, which is
really just a
put it back button they can keep.
↓
system
Two weeks later, one
nudge. That is
the last email, ever
↓
passerby
Puts the book back, taps I put it back from the email or
re scans the lid
↓
The ways it actually goes
Four branches, and every one of them ends somewhere defined.
3
takes it without scanning anything
The list is wrong until the curator notices a gap on the shelf and
taps mark out, or until it turns up back in the box and
nobody ever knew. The most common path by far.
brings it back without tapping
Same thing in reverse. The copy reads as out for weeks, then the
curator sees it on the shelf and marks it in. The reminder email is
the main defense against this one.
never comes back
Sits as out, rolls past a few weeks into the red, and eventually the
curator marks it
gone from
the dashboard. No fee, no email,
no record of who.
keeps it four months, then returns it
The I put it back link never expires, so the copy goes from
gone to on the shelf. Every state in this product is reversible for
exactly this reason.
4