[1] It is outlined in his book A Practical Guide for Policy Analysis: The Eightfold Path to More Effective Problem Solving, which is now in its seventh edition.
The method is named after the Buddhist Noble Eightfold Path, but otherwise has no relation to it.
The New York taxi driver test is a technique for evaluating the effectiveness of communication between policy makers and analysts.
Bardach contends that policy explanations must be clear and down-to-earth enough for a taxi driver to be able to understand the premise during a trip through city streets.
The New York taxi driver is presumed to be both a non-specialist and a tough customer.