Learn about Design of Experiments (DoE) and how it can help you achieve optimal results from your experiments
Published 29 Nov 2022
Design of Experiments (DoE) is a systematic method used in applied statistics for evaluating the many possible alternatives in one or more design variables. It allows the manipulation of various input factors to determine what effect they could have in order to get the desired output or improve on the result.
In DoE, experiments are being used to find an unknown outcome or effect, to test a theory, or to demonstrate an already known effect. They are done by scientists and engineers, among others, in order to understand which inputs have a major impact on output and what input levels should be targeted in order to reach a desired outcome (output). Simply put, DoE is a way to collect information during the experiment then determine what factors or which processes could lead to the desired result.
The term “Design of Experiments,” also known as experimental design, was coined by Ronald Fisher in the 1920s. He used it to describe a method of planning experiments to find the best combination of factors that affect the response or output. It is used to reduce design expenses because analysis of input parameters or factors gives way in identifying waste and which processes can be eliminated. It also helps remove complexities and streamlining the design process for cost management in the manufacturing process.
The key concept behind this methodology is that there is a relationship between the factors affecting the response. ISixSigma defined it as determining the “cause and effect relationships” of factors. Therefore, a complete experimental plan consists of the combination of factors used to evaluate their effects on the response.
MoreSteam gave a simple illustration to explain the components of the experiment—the three aspects that need to be analyzed in the design experiments—and understanding the meaning of each is crucial in defining DoE.
Cake-baking Process showing the Components of Experimental Design source: MoreSteam
Experimental design is not only conducted by scientists or engineers. It can be used by different industries who want to maximize the results they’re getting. DoE is conducted to:
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Below are some practical applications or examples on where DoE is applied:
Standard DoE processes are often structured around seven or fewer steps. The steps in experimental design will take you through the process of determining what is the best response that you could use in your study, workplace, or procedures.
Steps of Design of Experiments (DOE). Source: JMP
Perform a DoE to optimize any procedure in your workplace and integrate your experimentation with SafetyCulture, a powerful tool used by multiple industries in performing a more convenient and efficient way to monitor, collect, data recording, inspecting, and auditing.
With the support of SafetyCulture, engineers, scientists, manufacturers, and researchers, among others, can do the following during the experimental design:
Browse checklists helpful to experimental design:
Loida Bauto is a content contributor for SafetyCulture. An Interior Designer by training, she began to pursue her passion for writing in 2017. Her interests involve a diverse range of topics such as Disability, Universal Design, and Sustainability, among other matters that aim to improve the world we live in. She is a self-published book author in 2018 and 2021.
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