As more equipment suppliers directly operate their own ESS-LFP lines, a need has emerged to review line balancing and OEE management during the mass-production ramp-up separately from equipment-buyer-owned lines. Prompted by domestic equipment maker PNT's May 2026 earnings announcement, in which it stated it is focusing on yield stabilization for its Plant 4 ESS-LFP battery/cathode-active-material production line with a target of mass-production conversion in the second half of 2026, this article designs and verifies a target scenario for the order in which the three OEE factors — Availability, Performance, and Quality — improve during a ramp-up phase in which both new materials and a new line are introduced simultaneously. It…