Meanwhile, considering the key factors that contribute to wasted inspection time, we can summarize the weighting factor based on the average result per reticle into Figure 2. Online setup is the major contributor, followed by reticle load/unload time. Next, the tool remains idle when waiting for the operator to schedule and dispatch the reticle followed by manual review of the inspection result. All these steps lead to lower daily throughput and increased cost of more tools to meet production requirements.