Answer:
a moving target in a competitive world
Explanation:
Armand Feigenbaum was widely known as an American quality control expert, who in his book, titled "Total Quality Control" suggested that quality is a productive system for incorporating the product and service development, quality sustenance and development actions for the purpose of providing products and services at the largely inexpensive degrees, which give full customer satisfaction.
He concluded that quality and accordingly customer value judgments are a moving target in a competitive market.
Therefore, For Feigenbaum, quality criteria always constitute "a moving target in a competitive world."
