Six Sigma is a set of techniques and tools for process improvement. It was introduced by engineer Bill Smith while working at Motorola in 1986. Jack Welch made it central to his business strategy at General Electric in 1995. Today, it is used in many industrial sectors.
One acre equals 0.0015625 square miles, 4,840 square yards, 43,560 square feet or about 4,047 square metres (0.405 hectares) (see below). While all modern variants of the acre contain 4,840 square yards, there are alternative definitions of a yard, so the exact size of an acre depends on which yard it is based.
you will need the square footage to determine how much grass seed to buy to calculate square footage measure your yard with measuring tape then multiply the length of your yard times the width of your yard if you know how many acres your yard is you can simply multiply that by 43560 one acre is equal to 43560 square feet determine which type of seed you will be using