The earliest example of equine footwear we have is made of animal hide and dates from about 600 B.C. This primitive hoof protector looks more like a horse bootie than what we think of today as a horseshoe. It was probably stuffed with dried grass or other available natural material and tied on with hide thongs.
The spiral model is a software development process combining elements of both design and prototyping-in-stages, in an effort to combine advantages of top-down and bottom-up concepts. The spiral model was defined by Barry Boehm in his article A Spiral Model of Software Development and Enhancement from 1985. This model was not the first model to discuss iterative development, but it was the first model to explain why the iteration matters.
By Marios Alexandrou. Lean Development focuses on the creation of change-tolerant software. This methodology embodies the notion of dynamic stability which can be thought of as similar to how Scrum embraces controlled chaos.ob Charette, the originator, writes that the measurable goal of LD is to build software with one-third the human effort, one-third the development hours and one-third the investment as compared to what SEI CMM Level 3 organization would achieve.