NYC Transit Service Design by Massimo Vignelli
Massimo Vignelli is often known for designing a standard for signage for the New York City Transit Authority in the 70s. But what most people aren't aware of is that he played a significantly role in informatics and strategic placement of the signs as well. They may not have called this "service design" at the time, but it's fascinating to discover that they were approaching the problem in a similar way over 40 years ago.
Wish you well, Mr. Vignelli.