### Define correlation

Please forward this error screen to define correlation. To screen the numerous input variables by subjective analysis using the team’s knowledge and supporting data by weighing each according to their correlation to impact on the problem.

The figure below shows the linkage of the commonly used subjective tools. Briefly discuss the input and its meaning so each appraiser understands. Weigh the input as it correlates to each Y, using the weighting scale the team has established. Compute the total score for each input. Sort the input scores in descending order. Determine cut-off point and carry these inputs to the FMEA for risk analysis.

This will help to get a better decision on the weighting by each person as it correlates to the problem. The cut-off point may be a certain score and higher OR the team may decide to focus on targeting a specific section of the detailed process map where most of the highest scores exist. There is not a specific criteria, this tool will shed light on what the cross functional team thinks are the most important inputs to improve and control that will lead to a closure in the project gap according to the contract. Shown below is a sample calculation for one input. A spreadsheet can be created to automate and sort the steps shown above.

Completion of this tool must be used with a solid plan to keep it quickly progressing. It can take very long time to complete if there is not a plan to weigh each input. This is normally done in a room with everyone on the team present for cross-functional representation. For instance, if there are 50 unique controllable inputs identified from the Fishbone Diagrams and there are 4 project Y’s, then there will be 200 appraisals. And if there are six people weighing in on each of those 600 scores, it can take a very long time. There should be a quick vote and the Process Owner should make the final call on the score if there are ties or disagreements. Sometimes, a column is added to indicate the EASE OF COMPLETION.

These do not necessarily have to be taken to the FMEA for risk analysis. BB and a couple members of the team but the subjective screening tools require as much of the team as possible. A Correlation Matrix template is available here. Plug in the x’s and y’s along with the weights and begin adding scores. The totals are calculated and then sort by the highest scores to see the inputs that the team subjectively determined to have the most impact on the project. One source that links the most common Six Sigma material with examples, tools, and templates.

The following presentations are available to download. Jump to navigation Jump to search This article is about correlation and dependence in statistical data. In statistics, dependence or association is any statistical relationship, whether causal or not, between two random variables or bivariate data. Correlations are useful because they can indicate a predictive relationship that can be exploited in practice. For example, an electrical utility may produce less power on a mild day based on the correlation between electricity demand and weather. In this example, there is a causal relationship, because extreme weather causes people to use more electricity for heating or cooling.

Formally, random variables are dependent if they do not satisfy a mathematical property of probabilistic independence. In informal parlance, correlation is synonymous with dependence. Pearson correlation coefficient of x and y for each set. 0 but in that case the correlation coefficient is undefined because the variance of Y is zero.