ABSTRACT
VI. Concluding discussion Summary of experimental designs for screening What do we do about the factors that are left out? Reproducibility and repeated experiments Some considerations in analysing screening data and planning future studies
I. SCREENING OF FACTORS
A. Its Place in Development
To screen is to select from the factors which may possibly influence the process or phenomenon being studied those which have a real effect, an influence that is distinguishable unequivocally from the background noise. This study is normally done very early in the life of the project in order to simplify the problem and thus enable the experimenter to concentrate his attention and resources in a more detailed examination and optimization of the principal factors. Therefore, this stage should not take up more than 20 to 30 % of the total cost of the project (1).
