[0005] However, these two problems have the following differences from the real-world express delivery problem: the TSP problem requires that the starting point and the end point be the same, but the express delivery problem does not have this requirement. After delivering the express delivery, the courier can go to the company, go home or It is other places; the TSP problem requires each point to pass through and only once, but express delivery does not have this requirement. Returning to the original address, it is also possible to deliver other express mails through this
community; the TSP problem abstracts the problem into a
distance matrix between known points, but in actual problems, all delivery addresses are delivered when the courier gets the express mail. I just learned that there are temporary new pick-up addresses or changed delivery addresses on the way, and the precise distance between these addresses cannot be known by people alone
Therefore, the solution to the TSP problem cannot be directly applied to the express delivery problem.
On the other hand, the VRP problem is compared with the express delivery problem: the VRP problem assumes that the delivery carrier is a vehicle, and the GPS
system is installed on the vehicle to facilitate the positioning of the vehicle, and the
server obtains its current address; in the express delivery, many couriers Tricycles are still used to carry the express, not to mention the GPS
system, so the
server side cannot know the real-time address of each courier; another premise related to this is that the VRP is received by the control center, cancels and modifies the destination address of the vehicle, and It is also the control center that notifies each vehicle of how it is currently traveling and where the next destination is. In other words, the vehicle itself has no autonomy. In the case of express delivery, the courier directly contacts the
receiver. The incident also occurs in the direct contact between the customer and the courier, so the courier is the person who directly obtains the first-hand information. If the information is notified to the control center one by one like the VRP problem, and then the control center informs the courier after planning, It will only seriously reduce the efficiency, and in the traditional express delivery industry, the courier also decides the delivery
route by himself. Therefore, the best choice for
intelligent planning of the express delivery route is to conduct it on the widely popularized and portable
mobile device. Development; the VRP problem considers fleet routing management, that is, it considers how to dispatch each vehicle. Although the number of vehicles can be limited to 1, this cannot reflect the advantages of VRP. Since the express delivery problem needs to be solved from the mobile terminal, Only one courier's delivery
route planning can be considered, and it is not suitable for multi-person scheduling
Therefore, the solution to the VRP problem is not directly applied to the express delivery problem.
[0006] In addition, the "Design and Implementation of Express Delivery
Software Based on Android
System" proposed by Lei Peng is also on the mobile terminal, but it mainly studies the
software design level, involving the
server and
client, and does not study the delivery route method. Cannot provide assistance in solving the planning of express delivery routes
And we know that in the process of express delivery
in real life, the delivery route is a personal choice, which is largely related to personal preferences and habits, and there is also a certain degree of randomness. When there is a new pick-up or change of delivery address, the courier is likely to continue to deliver along the established delivery route without re-planning the
optimal route, which leads to a serious inefficiency in express delivery. Not only was a lot of manpower, fuel and time wasted, resulting in delays in express delivery and delivery to customers in time, but also a huge physical and mental burden on the courier itself
However, the solution to this problem has not been studied in depth, so it is urgent to study a new distribution method.