The list comprised of 749 client coops of under Class 1, Class 2, Class 3 and Class 4 from every region of Thailand,
In this research, a 10% sample of the population was used. The survey sample consisted of 200 agricultural coops with the following composition: 1) Class 1 - 45 coops, 2) Class 2 - 40 coops, 3) Class 3 - 56 coops, and 4) Class 4 - 59 coops.