This is a data/process flow and architecture diagram I developed as a self learning assignment for a Cab Booking system where a customer calls a Cab Booking Service's Customer Care department and how the call and data flows from one system to another till the Customer boards the Cab, reaches its destination and makes the payment to the Cab.

1. Taxi &Booking Database
(SQL Server)
Customer
Online Taxi Booking
Website
Customer Care Desktop
SMS Service
Taxi 1
Taxi 2
Taxi 3
Taxi 4
Mobile
App. For
Taxi
Drivers
Taxi 3
Print Invoice
Logs in
and
Gives
Taxi
Reques
t
C# ASP.Net UI C# Winforms/WPF
Board
s
Taxi
C# Windows/
WCF Service
C# OR
Java
New Taxi
Request SMS
New Taxi
Request SMS
New Taxi
Request SMS
New Taxi
Request SMS
Taxi 3 Accepts New Taxi Request
Taxi Alloted& its Details SMS
Taxi 3 is confirmed and
Passenger Details SMS
Log
Ne
w
Bo
oki
ngs
Taxi Alloting Algorithm
GPS
Navigation
System
Connected
Co
nn
ec
te
d
Query
Taxi &
Driver
Detail
s
Thank you for Service SMS
Pa
y
m
en
t
Book by Phone
Taxi 3 Confirms Payment