3.6.1. Introduction

The idea of the One factor At a Time (OAT) design-of-experiments is to observe the evolution of phenomena when one input factor is modified while all the others remain unchanged.

This design-of-experiments can be used to compute partial derivatives or sensitivities. For the latter application, it is interesting as it provides a very simple and inexpensive way to evaluate the sensitivity of a phenomena to its input factors. However, it might not be the best solution as it does not explore multi-factorial and non-linear effects.