Which of the following are the 3 E's of a professionally functioning public purchasing operation?

The three E's of a professionally functioning public purchasing operation are Efficiency, Effectiveness, and Economy.

Understanding these principles is crucial for public purchasing agents.

Efficiency refers to the ability to maximize output while minimizing wasted resources, ensuring that the purchasing operation runs smoothly and effectively. Effectiveness means achieving the desired outcomes and meeting the set objectives within the purchasing process, making sure the right goods and services are procured to meet public needs. Economy focuses on the prudent use of public funds, which involves obtaining the best possible quality for the lowest cost, thus ensuring taxpayer money is spent responsibly.

Each of these principles works in tandem to create a robust purchasing strategy that not only meets legal and regulatory requirements but also fulfills the mission of public service adequately. The choices that include other terms like expense, engagement, or evaluation do not encapsulate the core focus of the public purchasing profession as effectively as the selected answer.