In this article, att nighthawk hotspot we show that the way a delivery round is organized and executed is more complicated than the designers of the delivery real-time software could presume (in regard with the criterion they use to conceive their software).Like others professionals nomads (postman, usher), the deliverymen spatial skills’ are a material knowledge and a social knowledge.We use the situated action and the social vegetable glycerin for sale cognition approach to show that the deliverymen’s task needs a work of articulation between different worlds.
This work of articulation is optimized with a calculation made when the deliverymen prepare their rounds and during the rounds.They use different spatial devices.These devices give some different viewpoints of the space to travel in.