A firm order vendor evaluation using a stratified sample

This paper examines a firm order vendor evaluation done at the Eisenhower Library, Johns Hopkins University. The entire population of firm orders for domestic publications was used as the sample for a controlled study of vendor performance in terms of order fill rate, vendor efficiency, and cost effectiveness. We attempted to ensure the accuracy of our study by stratifying the sample population, and by performing tests for statistical significance on our results. The final results of the survey helped determine the domestic vendor policy at the Eisenhower Library.