What is the importance of evaluating sales force performance? Evaluation allows managers to see which salespeople should be terminated. Evaluation to assess what works validates planning and creates a cycle of success. Evaluation fosters an attitude of awareness and detail-orientation in the sales force. Evaluation puts the sales force on warning that salespeople need to meet their input quotas. Evaluation demonstrates rule-compliance to upper management. See Answer Evaluation to assess what works validates planning and creates a cycle of success.