The Four Bolts That Hold the Passenger Seat in a Pickup

Multiple Choice

The four bolts that hold the passenger seat in a pickup truck are tightened in a clockwise order beginning with the front right bolt, in 24 seconds. This production factoid illustrates which of the following principles of the Toyota Production System?

A) All work must be specified as to content.
B) Every customer-supplier connection must be direct and unambiguous.
C) The pathway for every service and product must be direct.
D) Any improvements to the system must be made in accordance with the scientific method.