LSSGB: The advantage of using the modern designed method of experimentation, rather than the classical OFAT is that:

Options

• Everything is held constant except the factor under investigation
• Experimental error is recognized but need not be stated in quantitative terms
• Fewer terms and measurements are needed for valid and useful information
• The sequence of measurement is often assumed to have no effect

Answer

Fewer terms and measurements are needed for valid and useful information

EXPLANATION

The key to this question is the meaning of the word “classical.” To most authors, this term refers to varying one factor at a time while holding all other factors constant. Although this approach may work for very simple problems, it causes havoc with moderately complex systems. The fixed factors do vary, which can waste time, effort, and money. This traditional approach can yield invalid or inconclusive results. Modern design experimentation (including fractional factorials, improved three factor designs, and Latin square logic) squeeze a large amount of valid information from a few trials.