A season is largely won or lost before a single garment is designed, in the line plan. Line planning is where a brand decides what it will actually offer: how many styles, in which categories, at what prices, and when they reach the floor.
The term gets confused with its neighbours, so start with what it is not. Line planning is not the buy budget, not the store-by-store mix, and not factory scheduling. It is the shape of the collection itself, and this guide covers what goes in a line plan, how to build one, and where it fits.
What is line planning?
Line planning is the fashion process of deciding what products a season's collection will contain: the categories, the number of styles or options in each, the colors, the price points, and the delivery timing. It is led by merchandising, with design and sourcing, and it sets the offer before the buy.
It turns a sales and margin target into a concrete product line. Not yet the exact units to purchase, but the shape of the range: how many options, at which prices, covering which customer needs, that design will then create and that merchandising will later buy and allocate. Each season it edits that range up or down against proven carryover and genuine newness, rather than starting from a blank page.
What a line plan includes
A line plan is a structured document, usually a grid by category and season. The fields that matter most:
- Category and class: the merchandise structure the line is organized by, so options and budget balance across it.
- Option count: how many styles or SKUs each category will carry, the core discipline that keeps a line focused instead of bloated.
- Colors and sizes: the colorways per style and the size range, which multiply into the real SKU count.
- Price points and price architecture: the good-better-best price tiers the line has to cover.
- Cost and margin: the target cost and the margin each option must protect.
- Delivery and drops: when each part of the line reaches the floor across the season.
A worked snapshot makes it concrete. A women's tops category might be planned at twelve options for the season: four core styles carried in three colors each, and eight fashion styles in one or two colors, across three price points. That single line is already around two dozen style-color combinations before sizes multiply it into well over a hundred SKUs, which is exactly why the option count is planned rather than left to design.
How many options should a line carry?
There is no magic number. The right option count comes from each category's role, the price architecture, and how deep you can afford to buy. The discipline is to carry only as many options as you can support with enough depth to sell through.
Core categories that replenish can run leaner, with fewer options bought deep. Fashion categories carry more options to cover trend and newness, but each one is a shallower bet. The failure mode is the same everywhere: too many lookalike options, each bought too thin, so none reaches the depth that drives sell-through, and the surplus becomes markdowns.
- Anchor to price tiers: cover each good-better-best tier on purpose rather than clustering most options at one price.
- Balance newness and carryover: repeat proven options, and reserve the rest of the count for genuine newness rather than variations on last season.
Line planning vs assortment planning vs merchandise planning
These three run in sequence and get conflated constantly. The short version: merchandise planning sets the money, line planning designs the offer, and assortment planning places it.
- Merchandise planning: the financial plan, what to buy, how much, and when across the range. See the pillar on merchandise planning.
- Line planning: what products the line will include, the option, price, and color architecture of the collection. This article.
- Assortment planning: how that line is mixed and allocated by store or channel, breadth versus depth. See the guide to assortment planning.
Line planning sits in the middle: downstream of the financial targets, upstream of the store-level mix. Get it wrong and no amount of clever assortment or buying rescues a line that offered the wrong things.
The line planning process
- Review last season. Start from what sold: last season's sell-through, best and worst options, and the price bands that worked, so the new line edits rather than repeats.
- Set targets by category. Translate the merchandise plan's sales and margin into option counts and a price architecture for each category.
- Build the option plan. Decide how many options, in which colors and at what prices, each category carries, balancing newness against proven carryover.
- Align design and sourcing. Hand the plan to design as a brief, and test it against sourcing lead times and target costs before it hardens.
- Refine into the buy and assortment. As samples and costs firm up, the line plan feeds the buy budget and the store-level assortment.
Through all of it the line plan is a living document, not a one-time deliverable. Costs move, samples come back different, and early results on carryover shift the bets, so the plan is revised until the range is locked for production.
Why line planning matters
- It controls option bloat: a fixed option count stops the SKU proliferation that fragments demand and buries the winners in lookalikes.
- It protects price and margin: planning prices and costs up front keeps the line hitting its good-better-best tiers and the margin the plan assumed.
- It keeps the collection on time: a clear line plan is the brief that lets design and sourcing hit the calendar instead of improvising.
- It aligns the teams: merchandising, design, and sourcing working from one line plan beats three teams reconciling three versions.
Line planning vs production line planning
One disambiguation worth making. In garment manufacturing, line planning can mean scheduling orders across the sewing lines in a factory, a production and capacity problem. This guide is about the merchandising line plan, the product offer of a collection, not factory line scheduling. Same words, different discipline.
Common line planning mistakes
- Too many options: padding the line with near-identical styles that split demand and finish the season as markdowns.
- Planning in isolation: building the line without the financial plan, sourcing lead times, or last season's results in the room.
- No price architecture: a line with no deliberate good-better-best structure ends up competing with itself on price.
- Copying last season: carrying the line forward by habit instead of editing to what sold and what is coming.
- Treating it as static: never revisiting the plan as costs, samples, and early sell-through change the picture.
From line plan to the right line
Line planning decides what a collection will offer. It cannot, on its own, tell you whether the market will want it, which is the difference between a tight, profitable line and a warehouse of well-planned mistakes.
That is a demand question. Apshan builds the signal layer above the plan, a connected, sourced read on fashion demand, so the line you plan is pointed at what the market actually wants before design commits. See how it feeds merchandise planning and retail math, or request access and see the plans and pricing.