Step 1: Malaria metrics split into two groups - those that quantify disease in the community and those that gauge how effectively the control programme is operating.
Step 2: Annual parasite index and annual falciparum incidence both quantify infection burden, placing them firmly in the epidemiological group.
Step 3: ABER, or Annual Blood Examination Rate, simply tracks the share of the population sampled by blood smear, which describes surveillance effort rather than disease occurrence.
Step 4: Being an operational efficiency measure, ABER is the one that is not an epidemiological indicator.\[\boxed{\text{ABER}}\]