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Posts Tagged ‘Design of Experiments’

Analyzing Experiments with Ordered Categorical Data

Six Sigma projects often deal with experiments whose outcomes are ordered categorical data, rather than continuous. It is important to know the right analysis methods for these cases, such as Jeng and Guo’s weighted probability-scoring scheme (WPSS).

Case Study: Using DFSS and DOE to Increase Product Reliability

A medical devices company launched a substrate development effort using DFSS and DOE to predict the stress caused by the laser welding process and ensure product reliability.

Decision-Making with Cause-and-Effect Analysis and DOE

While most companies are using similar techniques informally, cause-and-effect analysis combined with design of experiments can provide real data to help a company decide how and where it can best allocate the funds to improve its business processes.

Design For Six Sigma Roadmap

Building a DFSS roadmap for the development of products is shown through the sequential use of tools for the development of robust products.

Design of Experiments – A Primer

Understanding the terms and concepts that are part of a DOE can help practitioners be better prepared to use the statistical tool.

Design of Experiments for Software Testing

When DOE is used for software testing, there is a large amount of savings in testing time and cost. Use of orthogonal array based testing has demonstrated to produce superior test plans that improve testing productivity by a factor of 2.

Design of Experiments to Optimize Any Process or Product [VIDEO] – With Mark Kiemele

Design of experiments (DOE) is one of those specialized and sophisticated tools you should have in your toolbox. It is a technique to optimize any process or product better, faster and cheaper than other optimization methods, including A/B testing (also known as OFAT or one-factor-at-a-time) and "expert" guessing.

Design of Experiments/Conjoint Analysis in Marketing

DOE, known in marketing as conjoint analysis, is a powerful statistical technique for seeing connections between a customer's decision-making process and a product or service.

Designing and Analyzing Experiments with Mixtures

In the development phase of DFSS, practitioners frequently deal with experiments to determine optimal ingredient mixtures for desired products. An example from the medical device industry helps outline these experiments in a step-by-step process.

DOE for Services: Right Training Makes It a Valuable Tool

When it comes to mastering design of experiments (DOE), many experience a steep learning curve. To fully understand and apply DOE, quality professionals need to learn when to use it, how to set up the experimental design and how to interpret results.

DOE in Software Testing: The Potential and the Risks

While statistical approaches to software testing like DOE do hold promise, those who use them need to understand them in a balanced way – looking for where they do and do not fit. Test designers also should understand some of risks involved.

DOE: The ‘Power Tool’ of the Analyze and Improve Phases

Each step of the DMAIC methodology brings a distinct set of tools to bear on the project objective. For the Analyze and Improve phases, design of experiments (DOE), combined with analysis of variance, is the Six Sigma "power tool."

From Quality Control to Quality Improvement

This article presents a case study in applying control charts and experimental design.

Give Trainees DOE Experience with Simulated Experiments

Design of experiments (DOE) is an important tool for driving improvement. Through simulations used in training, new Belts can get hands-on experience while learning the challenges of DOE before they apply it to costly real-world experiments.

Importance of Test Plans/Test Protocol (with a Template)

Test plans, which outline requirements, activities, resources, documentation and schedules, are an important part of performing an experiment. They save time and money, help get the best results and facilitate speedy test report writing.

Most Practical DOE Explained (with Template)

For purposes of learning, using, or teaching design of experiments (DOE), one can argue that an eight run array is the most practical and universally applicable array that can be chosen. There are several forms of and names given to the various types of these eight run arrays (e.g., 2^3 Full Factorial, Taguchi L8, 2^4-1 Half Fraction, Plackett-Burman 8-run, etc.), but they are all very similar.

Optimize Attribute Responses Using Design of Experiments

The objective of a design of experiments is to optimize the value of a response variable by changing the values of the factors that affect the response. This article explains how to analyze an attribute type of response (e.g., pass/fail, accept/reject, etc.).

Process, Product and People: 3P Approach to Quality

Quality management should be a holistic approach. Process, product and people are the three key elements of a company’s quality system and all of them need to be focused on for an overall improvement in performance.

Reducing Variability With DOE

As a result of doing systematic experimentation, using sound statistical principles, the quality of processes can be improved and become more robust to variations in the levels of components and processing factors. Apply powerful design of experiments (DOE) tools to make your system more robust to variations in component levels and processing factors.

Role for Design of Experiments in Financial Operations

The underused DOE tool can be valuable to financial services businesses when they realize the reason it is a favorite in general business environments: It is an extremely efficient way of identifying what matters in a process and what does not.

Save Time With Fractional Factorial DOEs

Design of experiments is a key tool in the Six Sigma methodology because it effectively explores the cause and effect relationship between numerous process variables and the output. Fractional factorial designs are good alternatives to a full factorial design, especially in the initial screening stage of a project.

Teaching DOE Using Formula Fuelers Toy Motorcycles

Teaching DOE to DFSS trainees offers challenges on how best to transfer knowledge. Needed are constant and accurate results in examples used, reasonable material costs and instructional techniques to keep class interest. Solution: A toy motorcycle.

The Importance of Statistical Thinking

This article displays two case studies that illustrate that there is no set rule to understanding variation based on the order of Six Sigma tools used. Six Sigma Black Belts need to understand when to use each tool in business projects.

Three Romeos and a Juliet – An Early Brush with DOE

Three young men, each being infatuated with the same woman, agree to conduct a design of experiment of love. Statistics and romance intertwine in this entertaining and educational real-life story. Which bachelor will end up with the young lady's hand? Will the design of experiment prove successful?

Using DOE to Solve a Product Development Problem – An iSixSigma Case Study

Design of experiments (DOE) helps an automotive company determine factors affecting defect levels in an alternator it manufactured. DOE identified the cause of ventilation noise within the alternator, and moved the problem toward resolution

When and How to Use Plackett-Burman Experimental Design

Plackett-Burman experimental designs are used to identify the most important factors early in the experimentation phase when complete knowledge about the system is usually unavailable. They allow practitioners to screen for the important factors that influence process output measures or product quality, using as few experimental runs as possible.

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