doeintroduction(ppt39)(英文)-質(zhì)量工具-展示頁(yè)
2024-08-30 09:04本頁(yè)面
【正文】 gy of Experimentation 9 Step 1 Problem Statements ? Definition and description include: 187。 Analyze the Data 187。 Sample Size 187。 Choose the Factor Levels ? Step (4) 187。 Select the Output (Response) ? Step (2) 187。 Define the Problem 187。 Experimental Design Selection 187。 Response Selection 187。 Barriers to effective designed experiments 187。DOE Introduction The purpose of an experiment is to better understand the real world, not to understand the experimental data William Diamond IBM Retired Statistician 2 At the end of this module, you will be able to ? Explain how experimentation is similar to and different from hypothesis testing ? Design of Experiment 187。 Defined 187。 Execution Strategy 187。 Factor Selection 187。 Inference Space Considerations Module Objectives 3 Review of Hypothesis Testing Recall the Procedure from Analyze Phase ? Create the hypothesis ? Determine appropriate risk (a and b) levels ? Determine a critical difference ? Compute an appropriate sample size ? Investigate existing data / processes ? Take the data ? Analyze for significance ? Draw conclusions The purpose: to identify sources of variability 4 Experimentation The basic strategy for experimentation follows the same fundamental approach as hypothesis testingwith a few key differences ? Experimentation usually involves investigating variables, or levels of variables, for which data does not presently exist ? A design for the experiment is carefully planned and executed ? Conclusions are used to improve the process rather than identify sources of variability 5 ? Identify the variables and levels for experimentation ? Create the hypothesis ? Determine appropriate risk (a and b) levels ? Determine a critical difference ? Compute an appropriate sample size ? Plan the experiment execution ? Take the data ? Analyze for significance ? Draw conclusions ? ? ? = key difference The purpose: (usually) to minimize sources of variability or to optimize the process Experimentation Strategy 6 DOE Defined ? A systematic set of procedures and checks which permits one to evaluate the effect of one or more factors without concern about extraneous variables or subjective judgments. ? Begins with the statement of the experimental objective and ends with the reporting of the results. ? It may often lead to further experimentation. ? It is the vehicle of the scientific method, giving unambiguous results which can be used for inferring cause and effect. 7 Problem not clear Objectives not clear Inadequate brainstorming Results of the experiment unclear DOE is too costly DOE is too time consuming Lack of understanding DOE strategies Lack of understanding DOE tools Not confident during the early stages Lack of management support Need for instant results Lack of adequate coaching / support Barriers to Effective Experimentation 8 Design Of Experiments: Any investigation in which the inputs are controlled and the analysis has been planned ? Step (1) 187。 Establish the Objective 187。 Select the Input Factors (X’s) ? Step (3) 187。 Select the Experiment Design amp。 Collect the Data 187。 Draw Conclusions 187。 A plete
環(huán)評(píng)公示相關(guān)推薦
鄂ICP備17016276號(hào)-1