What are the advantages of a Best$-$Guess $($Trial and Error$)$ experiment versus a Factorial or Design Experiment?

A$.$ Best$-$Guess is more efficient.

B$.$ Because of their familiarity with the process, a team could identify the process changes to try.

C$.$ You can change multiple variables at a time.

D$.$ It provides a complete understanding of the interaction between the changes made to the

experiment.The levels set for each factor does not depend on which of these considerations?

A$.$ If the team is performing a screening experiment.

B$.$ If the team likely already has an understanding of the input impact on the process.

C$.$ The process itself.

D$.$ The number of replications.