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.
Six Sigma History. Six Sigma history is relatively recent. As a quality management methodology Six Sigma was designed by Bill Smith at Motorola in the late 1980's.Bill is known today as the true father of Six Sigma. He forged the path for Six Sigma through Motorola's CEO Bab Galvin who endorsed Bill's efforts and enthusiasm.uring the late 80's Motorola began spreading Six Sigma as a discipline throughout it's company, leveraging Mortorola University. Soon, a culture of quality permeated and in 1988 Motorola was recognized with the Malcolm Baldrige National Quality Award which was a crowning Achievement.