Option: Cassie
Pros
Diverse
Cassie is dependent on the road and his environment, but because is can walk everywhere and stay stable he can walk almost everywhere where also a human can walk.
Privacy
Because Cassie walk on the sidewalk he does not effect any privacy as just a human would do when he/she walks on the sidewalk, therefore the privacy remains the same.
Door to door
Cassie can deliver door to door because he walks on the sidewalk which is connected with the houses.
Sustainable
Cassie uses electricity which can be green electricity so that he is sustainable .
Cons
expensive
The investments are quite big because cassie is not fully operational yet and has some hightech stuff in it what costs alot. But after these investments the maintenance of the robot is not that expensive and it will outweight the costs of devilery at the moment.
Available space
Cassie is limited in packaging space. It is necessary to deal with this space in a strategic way. Do you chose for a couple of light, small packages, or just one big, somewhat heavier package. This choice is dependent on all kinds of factors (e.g., place of delivery), but we think it is possible for this to be dealt with through an algorithm.
Restrictions
The rules need to be made about the use of autonomous robots for delivery.
slow
Because it walks at human speed the robot is kinda slow in comparison with cars or planes, so for long distances there still is a another vehicle needed to get the package in a decent range so cassie can be used.