Back in January, I reviewed the 4th edition of Dr. Ron Dieck's important book, Measurement Uncertainty. Now, ISA has announced that you can buy this book at a 15% discount. Let me be blunt. If you are willing to admit that you know as little as most people in our business about measurement uncertainty, buy and read this book. Fact is, even very senior automation professionals, like the one I talked about in the post in January, do not always have a clear grasp of the basis of uncertainty. After all, most of us blew through statistics one semester, just so we could have the credit. Ron Dieck has spent most of his life studying and teaching measurement uncertainty. If you're honest enough to admit that you don't exactly understand it, give him a read.