the process of joining strips, squares, triangles, hexagons, or other shaped pieces of fabric (also called patches), by either hand or machine stitching, into square blocks or other units. It is one of the primary construction techniques of quilting and is often combined with applique. In constructing the quilt top the pieced blocks may be stitched together, alternated with blocks cut from a single fabric, or separated by long strips of fabric known as sashing. The blocks may be arranged in a wide variety of settings, including rotated 90 degrees "on point." Pieced or plain border strips are often added to complete the quilt top. In the crazy quilt the patches are of irregular size and shape; like crazy blocks, string-pieced blocks, formed of strips of fabric, are sewn to a fabric or paper foundation
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