Do you have questions about the content or use of a download?

If you have any questions about the downloads and how they are used for reference in the book, this is the place to post them. The downloads are meant to provide readers with examples that are already set up and, in many cases, can already use on practical problems. If you have questions about how they apply, feel free to bring it up.

This would also be a good place to make suggestions for more downloads that might help readers understand various concepts from the book. If you have an idea for a helpful example that would be of use to other readers, let me know and I will post it.

Thanks,

Doug Hubbard

Intro To IT Value

Yes, IT seems to stump a lot of people that try to measure its value. But the methods for measuring value don’t have to be that difficult. First, my readers will know that measuring the value means reducing your prior uncertainty about the value. My readers also know that the more your initial state of uncertainty, the more a few observations will tell you.

Contribute specific IT valuation problems here and we’ll talk about how to measure it!

Doug Hubbard

Bayesian vs. Frequentist?

Under the Errata forum in a thread I called Second Print Run Corrections , one poster replied that he believed I incorrectly applied the term confidence interval in the book. I discuss several errors in that post in a reply in that thread. But it introduces another point of confusion apparently held by some about the difference between Bayesian vs. non-Bayesian methods in statistics and the epistemicologicaly philosophy debate of the frequentist vs. the subjectivist. I addressed it in another thread called Bayesian vs. Frequentist in this In the Clouds forum topic.

The Value of a Life?

Again, by email and on this site, someone has asked how to measure value when the purpose of a project, policy, investment, etc. is to save a human life. One poster mentioned this in a thread he called Ominus Measurement Problem under the New Measurement Challenge forum. I explained in the reply that a method called Value of a Statistical Life is one method for doing that, that the VSL is mentioned in the book, and that I’ve actually used it to compute the benefits of IT systems that were meant to manage vital issues of public health (e.g. safe drinking water, etc.). I also addressed one problem this poster said he has run into about the putting a value on certain government programs. The poster pointed out one senior official who said You tell me how much a soldier’s life is worth, then I’ll believe in this measurement #^%&. In the reply I argue how the position of the official is far from the moral highground his apparent indignation would suggest he has.

ROI without Profit?

A couple of people have asked me questions about how you measure value when it is for a not-for-profit or government agency. At least one of them posted the question under the New Measurement Challenge section of this forum and some sent similar questions by email. I explained in the New Measurement Challenge in replay to a thread called the poster called Trending Measurements that economics is about the allocation of limited resources to meet various – usually competing – desires or needs. Whether a benefit is paid out to shareholders of a corporation as a dividend or if the benefit is for the greater public good, an ROI calculation can be done just the same. Just think of a dollar as a measure of value and don’t worry about whether an accountant would count it. See that thread for more detail.

Second Print Run Corrections

The errata and typos in the first print run that were mentioned in the first thread on this topic have all be addressed in the second print run. Fortunately, the book was selling well enough that the publisher had to go to a second print run much sooner than any of us planned. That allowed me to get those corrections in.

Thanks to everyone who posted suggestions for changes!

Doug Hubbard