Cookbook for Administrating Blackboard Learn

A Cookbook for Administration of Learn

Stephen FeldmanBlackboard, Inc.Product Development

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So Anybody Can Cook…Right?

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This Guy Doesn’t Think So…

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Let’s Go Back in Time to BbWorld 2011

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Two Stories of Significance

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Constructing the Panama Canal: The French Failure

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Constructing the Panama Canal: US Intervention

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1880 – 1890 Under French Control: 22,189 deaths

1904 – 1914 Under U.S. Control: 5,604 deaths

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The London Cholera Epidemic of 1854

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What Do These Stories Teach Us?

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Techniques for Presenting Data

o Time series statistics can provide benefit when viewed with appropriate context.

o Present data in percentileso Statistical averages should be analyzed with standard

deviation.o Histograms can tell a compelling story about groups of

outliers.o Scatterplots can tell a compelling story about individual

outliers.o Associate different types of data: response times with

resource utilization or throughput rates (clusters)o Correlation can lead to causation, but be confident and

careful

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Illustration of Variability

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o It’s dangerous to use past experience without considering the data of the present.

o It’s dangerous to ignore data.o Problems cannot be solved simply with extra capacity.o Looking at time-series statistical averages can be just

as dangerous.o Seeking out statistical anomalies as they will tell us so

much about how bad or defective the user experience truly is.

What Have We Learned?

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