And how much would it cost in terms of delivery time? For me it's really all about it.
Your delivery service costs $1B per year with the current throughput (without considering peaks etc.). Imagine now adding those constraints such as signature: it means that for each package you add another 1-2-3 minutes at least. For 100 packages a day it's almost 2 hours. With a salary of 7$ per hour = 14$ per day just to have signatures. And that's 100 packages, which is probably a joke for a delivery person.
14$ per day = almost 5K per year. Basically 700K is peanuts.
The problem of course starts when everyone believes "oh I am smarter than you, I can also do it". And then you lose not 700K but 50 millions or more.
Another way is to build up your own delivery company, measure performance of the delivery people (with feedback) and fire/sue them when you notice a continuous loss of packages and reward the good ones.
Your delivery service costs $1B per year with the current throughput (without considering peaks etc.). Imagine now adding those constraints such as signature: it means that for each package you add another 1-2-3 minutes at least. For 100 packages a day it's almost 2 hours. With a salary of 7$ per hour = 14$ per day just to have signatures. And that's 100 packages, which is probably a joke for a delivery person.
14$ per day = almost 5K per year. Basically 700K is peanuts.
The problem of course starts when everyone believes "oh I am smarter than you, I can also do it". And then you lose not 700K but 50 millions or more.
Another way is to build up your own delivery company, measure performance of the delivery people (with feedback) and fire/sue them when you notice a continuous loss of packages and reward the good ones.