A study based on samples of 56 companies with 50-99 employees, 94 companies with 100-499 employees, companies with 500-999 employees, and 85 companies with 1,000-5,000 employees reported that 20 of the companies with 50-99 employees, of the companies with 100-499 employees, 45 of the companies with 500-999 employees, and 61 of the companies with 1,000-5,000 employees are working simultaneously with five or more vendors