2.42 Design of Experiments

Introduction

Design of Experiments (DOE) is a systematic statistical approach for planning, conducting, and analyzing experiments. DOE helps identify the factors that influence a response, understand relationships between factors and responses, and determine factor settings that achieve desired results.

Unlike changing one factor at a time, DOE allows multiple factors to be investigated simultaneously. By carefully selecting experimental runs, DOE can provide information about the effects of individual factors, interactions between factors, and, for suitable designs, the response behavior within the experimental region.

DOE in Origin

Origin provides tools for creating, analyzing, and optimizing experimental designs. Depending on the design type and analysis method, you can use Origin to:

1. Define experimental factors and responses.
2. Create an experimental design.
3. Conduct experiments and enter the response data.
4. Analyze the experimental results.
5. Interpret statistical results and diagnostic plots.
6. Optimize factor settings to achieve desired response characteristics.

The DOE tools in Origin support a range of experimental design methods as below

Definitive Screening Design	Screen factors and identify important effects, including potential curvature.
Factorial Design	Investigate main effects and interactions between factors.
Response Surface Design	Model and optimize responses, including curvature.
Mixture Design	Study the effects of component proportions in a mixture.
Taguchi Design	Study factor effects using Taguchi experimental design methods.
Optimal Design	Create a design optimized for specified model and experimental constraints.

Workflow

Planning	Designing	Modeling	Optimizing & Visualization
Power and Sample Size	Define Custom Designs Create Design Select Optimal Design	Analyze Design Analyze Variability Analyze Binary Response‎	Optimize Response Overlaid Contour Plot

Sample Project File

1. Right-click on the app in Apps Gallery and choose Show Samples Folder from the context menu

   

2. Drag and drop the project file from the opened folder to the Origin workspace to open it

Topics covered in this section: Power and Sample Size (DOE) Define and Create Designs Analyze Design Additional DOE Analysis The Overlaid Contour Plot in DOE Optimize Response