Size curves, drops and seasonality, handled.
Plan seasonal ranges and drops at size and channel level — and re-plan live as sell-through tells you what's working.
- Buy the size curve before a single unit sells — and land the runners, not the broken sizes.
- Re-plan the range the week a drop lands, not a month later.
- Protect full-price sell-through and keep the season out of deep markdown.
What strong apparel planning delivers
Full-price sell-through — more of the range sold before the first markdown
Season markdown rate, cut toward the top-quartile benchmark
Size-curve integrity — the sizes that sell, kept in stock
Directional benchmarks for apparel & fashion planning, not a customer guarantee — audited results are in the story below.
Fashion lives and dies on the drop. Plan the range too safe and you leave full-price sales on the table; too bold and you carry the season into markdown. The hard part is that demand moves faster than the spreadsheet that's meant to track it.
Size curves, not averages
A style sells through unevenly by size and channel. Plan to the average and you stock out of the runners while the broken sizes sit.
Drops change the plan weekly
Every drop rewrites what's working. By the time last week's numbers are consolidated, the buy window has moved on.
Markdown eats the season
Ageing options get cleared late and deep, giving away margin you could have protected by acting two weeks earlier.
Meet your Demand agent
Forecasts new styles from look-alikes and re-forecasts the range on live sell-through, drop by drop.
Meet the agentsRe-forecast ready — 3 categories have drifted from plan this week. Want me to stage the moves for your review?
Built for how fashion actually plans.
One connected plan, with the capabilities that matter most for apparel & fashion doing the heavy lifting.
Demand forecasting
An ML forecast that learns from every channel signal — so the buy starts from real demand, not last year plus 5%.
ExploreAssortment planning
Build the assortment from the same plan — options, depth and size curves that match real demand by channel and door.
ExploreIn-season management
Sell-through changes the plan in real time — re-forecast, rebalance and re-buy without waiting for month-end.
ExploreMarkdown optimisation
Markdowns timed and sized to plan — clear ageing stock without giving away margin you didn't need to.
ExploreA look at the plan, tuned for apparel.
The details that decide it.
The short version: yes, it fits your hierarchy, your stack and your calendar. Talk to us about your range.
Do you plan at style-colour-size?
Yes. Every style is planned to its own size curve by channel, and the buy is committed to that curve — not a flat average that breaks your best sizes.
How fast can we re-plan after a drop?
The range re-forecasts on live sell-through the week a drop lands, so the chase and the next buy move with demand instead of last month's numbers.
Can we keep our Excel line plan during rollout?
Yes. Tightly reads your existing line plan and ERP, so teams keep working the way they do today while the connected plan takes over the heavy lifting.
It shows up in the numbers.
“The forecast finally reads the size curve our merchandisers saw in real life. We stopped selling out of the medium in week two and stopped drowning in the sizes nobody wanted.”
Directional outcomes for a DTC apparel brand planning size and depth on live sell-through.
Across apparel, leaders sell 71% at full price versus 57% — the gap is size-level availability on the runners.
Tightly · State of Retail Inventory 2026
Plan with confidence. One set of numbers, every team, every week.
There's nothing to rip out. Tightly runs on your existing ERP, EDI, e-commerce and POS. Give us 30 minutes and we'll show it on your own categories.