Besides helping you become a better modeler and a better manager of network design projects, this book can also help educate your clients.
This applies to internal and external clients.
Within your company, the book can help you publicize the value of your network design work, help your projects go smoother, and help you uncover new opportunities.
If you work for a 3PL, the book can help educate your sales team so they better understand client needs and understand when a network study may be needed.
If you are doing a project for a client, the book can help your client understand what you are doing and why you are doing what you are doing (like aggregation).