Reading same-store sales across Songkran weeks

Festival weeks distort every multi-branch pack. Songkran empties some residential corridors and floods tourist strips. If you compare raw totals without marking the calendar, a quiet suburban branch looks like a failure and a mall store looks like a miracle.

Mark the window before you chart

We ask clients to flag Songkran days — and the shoulder days when deliveries stall — before any same-store chart is drawn. The mark is visual: a thin band on the timeline, not a footnote nobody reads.

Compare like with like

A Thonglor fashion branch and a Chiang Mai old-town store rarely share the same Songkran pattern. Same-store means the same four walls over time, not a cross-city ranking during water festival week.

What to tell managers

Regional leads need one sentence: “This week is calendar noise; here is the prior non-festival Tuesday for context.” That sentence prevents staff from inventing operational excuses for weather and holidays.

Sales performance analytics for multi-branch retailers earns trust when festival distortion is named early — on the chart, in the brief, and in the room.