Gyeonggi and Busan Indices Do Not Move in Lockstep
A note on divergence points we see repeatedly in household consumables — and how buying offices use regional overlays.
<p>National wholesale indices are convenient. They are also frequently wrong for territory-specific ordering.</p>
<h2>The household consumables pattern</h2>
<p>In paper goods and cleaning supplies, we regularly observe Gyeonggi corridors tracking national indices within three percent — while Busan wholesale partners diverge by eight to fifteen percent during typhoon-adjacent weeks and early summer humidity spikes.</p>
<p>The divergence is not random noise. Busan's port-adjacent warehousing rhythm and different retail mix produce a genuinely different curve shape, not just a scaled version of Gyeonggi.</p>
<h2>How overlays help</h2>
<p>Our <a href="/services/regional-variance-audit/">Regional Variance Audit</a> produces side-by-side curves with annotated divergence weeks. Buying offices use these overlays to decide whether a national container split can remain, or whether Busan needs a separate order cadence.</p>
<h2>One caveat</h2>
<p>Regional overlays require clean territory labeling in your shipment data. If Busan and Gyeonggi volumes share a single warehouse code, we cannot split them without your mapping table. Prepare that before requesting an audit — it saves a full week of reconciliation.</p>