Home/Technical Glossary/Design of Experiments (DOE) Design of Experiments (DOE) Design of Experiments (DOE) is a tool used in resistance welding to help define which parameters are most important, and to reveal strengths and variations in the welding process. The first step of the DOE is to complete the Process Audit Worksheet (PAW) in order to identify all of the things which can affect the process. Download the Design of Experiments Worksheet Download the Process Audit Worksheet