trainqa

```plantuml

title Train QA

actor "Traveller" as traveller
participant "DB station realtime API" as db
participant "Data collector" as trains2
participant "Google Spreadsheet" as google
participant "Tableau data viz" as tableau


db->collector: collector pulls periodically timetable from train station
activate collector
collector->google: collector writes pull results in Google Spreadsheet
activate google
google->tableau: data are visualized in Tableau
activate tableau
traveller->google: Traveller can add more data based on the journey