When uncertainty arises during downhole operations, hours or days can be wasted on trial-and-error solutions. Operators have traditionally relied on pressure and pump charts to monitor operations, but in many cases, a pressure signature is not present or clear. The ePLUS® Retina monitoring system provides a cost-effective way to verify completion operations, accurately and independently from other measurements. By fostering an environment for confident decision-making, operators can troubleshoot problems quickly, safely, and effectively.