The inverted pyramid is a powerful metaphor for the
support Six Sigma requires to succeed. At the bottom of
the pyramid, supporting and balancing the structure, is
the executive leadership, whose vision and values form
the foundation, and without whose commitment the
entire enterprise would crumble. At the top of the pyramid
is the customer, around whose expectations Six
Sigma quality is built. Between the executives and customers
are the four types of players in Six Sigma: champions,
master black belts, black belts and green belts