dynamic search

Hi everyone,

I want to code a process, in which the item from differents places are collected and the distance needed are given. As an example, i have like to see on the grafic, differents items on differents aisles and i defined a routing policy to pick them up. Depending on the customer's order i want to pick the items on aisle and calculate the distance needed to back on start point. 

How can i do that? 

Thks