Pharmaceutical field teams in Gyeonggi often inherit territory boundaries drawn by postal code. The problem: major hospital campuses sit on borders, and outpatient clinics affiliated with the same system appear in three different districts.
We redraw clusters using admission referral patterns and your rep route sheets — not GIS defaults. A cluster represents where a rep actually spends a day, not where a postcode says they should.
Ansan-ro and surrounding corridors contain six clinics we routinely merge into two clusters because reps visit them in a single loop. Without this merge, coverage charts show artificial gaps.
When clients provide ride-along notes, we incorporate them as secondary validation. A district that looks fully covered on paper may show thin visit depth — something call counts alone miss.
Request your current route sheets when commissioning a territory review. They reduce back-and-forth in week two.