When Walmart considers reordering items for its stores, its buyers are instructed to negotiate price concessions, quality improvements, and/or added options. In this situation, Walmart buyers are engaged in a(n) situation.

Modified Re-buy

Explanation:

The reason is that many items that the company purchases are imported from different countries so the company wants to benefit from the favorable conditions and so it negotiates terms and conditions before making orders. It helps the company save maximum that it can or in other words this modified re-buy is the core function of procurement department and is the measure of efficiency for the department.