Illustration of Rajan Suri’s Power of Six relation between cost and time savings. Image gold-coin-stack by Petr Kratochvil and licensed in the public domain, modifications by me, and out of respect for Petr’s work also released in the public domain.
Many but not all of the images on this blog are under a Creative Commons License. If and only if the image above is under a Creative Commons license, you can find details for the different licenses at the Creative Commons. The most common licenses are Attribution CC-BY 2.0; 2.5; 3.0; and 4.0; and Attribution Share Alike CC-BY-SA 2.0; 2.5; 3.0; and 4.0;