If you read our recent article on HR big data, you know you can analyze your data without advanced analytical tools to discover connections, relationships, correlations, and causations. You may have already started on a test project to affect a business metric by applying your conclusions.
We need analytics to give us insight into the probability of future events and trends. In Predictive Analytics for Human Resources, Jac Fitz-Enz and John Mattox describe three levels of human capital analytics beyond simple reporting.
In a previous article, we described how to use descriptive analytics to develop a test case in which we studied trends and relationships to see how we might affect a business outcome. The time you spent in exploring relationships will guide your thinking in the next step in your path.
The next level in analytics uses predictive analytics to forecast results. The primary tool of predictive analytics is regression analysis.
Regression analysis has been with us for two hundred years. In its simplest form, linear regression, it compares two known variables to determine their relationship. In more complex forms, it can compare many variables and even functions with infinite dimensions.
Regression analysis gives us correlations -- how variables are related, and probability -- the likelihood that patterns will repeat. In marketing, we use the techniques to tell us who will be most likely to buy a product (and when, where, and why) so we can target marketing to those consumers.
Many organizations are using regression techniques to determine which candidates for employment will succeed. We find that statistical models are better at hiring decisionsing decisions than manager judgment, and we can create predictive models to tell us which employees are most likely to leave.
Many possibilities come to mind for using analysis of historical trends to predict outcomes. For example:
What makes predictive analytics work is the underlying assumptions. A false assumption can render a regression model invalid, and the assumptions that were true last year may not be valid today. Assumptions can also be invalid if we don’t include the right variables.
Good data analysts know how to test for the validity of your assumptions, and analytical software has tools for testing them. What is important for business leaders to understand is that invalid assumptions will lead you astray.
We recommend a few guidelines to follow to make sure your early efforts are a success.
Using predictive analytics will help you make better decisions and boost your chances of funding your projects. More important, your success will build your credibility with business leaders.
Recommended Reading:
Fitz-Enz, Jac, and John R. Mattox, II. Predictive Analytics for Human Resources. New Jersey: Wiley Publishing, 2014.
Davenport, Tom. "A Predictive Analytics Primer." Harvard Business Review. September 02, 2014.
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