m is studying the delivery times of two raw material suppliers. The firm is basically satisfied with supplier A and is prepared to stay with that supplier if the mean delivery time is the same as or less than that of supplier B. However, if the firm finds that the mean delivery time of supplier B is less than that of supplier A, it will begin making raw material purchases from supplier B.
So in other words your company or business is looking for the most consistent/reliable supplier who's supply rate is the better out of the two according to overall and long-term supply of said product
