Simplicity is the ultimate sophistication.

― Leonardo da Vinci

Life is really simple, but we insist on making it complicated.

― Confucius

V&V and UQ are often described by detractors as being too complex. It certainly can be, but it doesn’t have to be. In keeping with all the brilliant advise quoted here, I’m going to offer simple definitions for the main components of the practice. Each can be posed as a question we seek to answer.

  • Verification: (1) Do more computing resources yield better answers? (2) Is my model implemented correctly?
  • Validation: Does my model represent reality?
  • Uncertainty Quantification: How much different could my answers reasonably be?
  • Sensitivity Analysis: What variables do my answers most depend upon?

The downside is the failure to address a host of important technical details, but the simple definitions provide the core of this important topic.  What do you thinK?

Our life is frittered away by detail. Simplify, simplify.

― Henry David Thoreau

Any darn fool can make something complex; it takes a genius to make something simple.

― Pete Seeger