Line plan vs assortment plan: what’s the difference?
A line plan defines the range a brand intends to design and offer for a season — the styles, categories, price points, and key options — while an assortment plan decides how that range is distributed across channels, stores, or clusters and in what depth. The line plan is “what we will make”; the assortment plan is “where it goes and how much.”
They are sequential stages of the same season: the line plan frames the range, and the assortment plan deploys it.
- Definition — Line plan
- A line plan is the structured outline of a season’s range — the categories and subcategories, the number of options (styles and colours) in each, the price architecture, and the financial targets the range needs to hit. It is the agreement on what the collection will contain before depth and channel distribution are decided in the assortment plan.
- Used by: Design and merchandising teams shaping the season range
- Related: Assortment plan, buy plan, open-to-buy, option count
Definition of a line plan
A line plan is the structured outline of the range for a season. It sets out the categories and subcategories, the number of options (styles and colours) in each, the price architecture, and the financial targets the range needs to hit. It is the design and merchandising agreement on what the collection will contain before depth and distribution are decided. The line plan template gives a working structure to start from.
Definition of an assortment plan
An assortment plan takes the agreed line and decides how it is offered across channels and locations — which options go where, in what depth, and with what breadth. It balances choice against inventory risk: too broad and depth thins out, too narrow and the range looks weak. The assortment planning template provides a starting framework for option counts and depth by channel.
How they connect
| Line plan | Assortment plan | |
|---|---|---|
| Core question | What range will we make? | Where does it go and how deep? |
| Decides | Styles, categories, price points, option counts | Channel and store distribution, breadth and depth |
| Main users | Design and merchandising | Merchandising and planning |
| Output | An agreed range and price architecture | Options allocated across channels at planned depth |
| Feeds into | The assortment plan | The buy plan, POs, and production |
- Line plan
- What range will we make?
- Assortment plan
- Where does it go and how deep?
- Line plan
- Styles, categories, price points, option counts
- Assortment plan
- Channel and store distribution, breadth and depth
- Line plan
- Design and merchandising
- Assortment plan
- Merchandising and planning
- Line plan
- An agreed range and price architecture
- Assortment plan
- Options allocated across channels at planned depth
- Line plan
- The assortment plan
- Assortment plan
- The buy plan, POs, and production
The line plan sets the range; the assortment plan deploys it; the buy plan turns that into planned quantities, costs, and delivery timing.
Example workflow
- 1. Line plan — agree the spring range: 12 dress options, 8 knit options, three price tiers, with sales and margin targets.
- 2. Assortment plan — allocate the range across e-commerce, flagship, and wholesale, giving flagship the full breadth and smaller doors a curated core.
- 3. Buy plan — convert the assortment into planned buy quantities, costs, margin, and delivery windows, validated against open-to-buy.
- 4. Execution — issue purchase orders and track production and receipts against the plan.
Common spreadsheet issues
When the line plan and assortment plan live in separate workbooks, edits in one do not reach the other. An option dropped from the line plan can linger in the assortment; depth changes in the assortment never flow back to the financial targets in the line plan. By the time the buy plan is built, the three files disagree, and reconciling them by hand eats the time that should go into the decisions themselves.
How connected planning helps
From line plan to production, RetailNorthstar connects merchandising, design, buying, sourcing, and operations in one workflow. The line plan, assortment plan, and buy plan share one model, so dropping an option, changing depth, or shifting a price tier updates everything downstream — no reconciling separate files.
Frequently asked questions
- What is the difference between a line plan and an assortment plan?
- A line plan defines the range a brand intends to design and offer — the styles, categories, price points, and key options for a season. An assortment plan decides how that range is distributed across channels, stores, or clusters, and in what depth. The line plan is “what we will make”; the assortment plan is “where it goes and how much.”
- Which comes first, the line plan or the assortment plan?
- The line plan usually comes first. It frames the range and the financial targets for the season. The assortment plan then takes the agreed line and allocates it across channels and locations at the right depth, which feeds the buy plan and, ultimately, purchase orders and production.
- Do small apparel brands need both?
- Most brands do at least a light version of both, even if informally. A line plan keeps the range and price architecture coherent; an assortment plan keeps depth and channel allocation deliberate rather than even-split by default. As the range and channel count grow, the value of separating the two increases.
- How do line and assortment plans connect to buying?
- The assortment plan defines what to buy and at what depth by channel; the buy plan converts that into planned quantities, costs, and delivery timing, validated against open-to-buy. From there the plan becomes purchase orders and production. The line plan, assortment plan, and buy plan are stages of one flow.
- A line plan sets the season’s financial and structural shape — categories, options, price tiers, and targets.
- An assortment plan details the styles, colours, sizes, and channels that fill that shape, and at what depth.
- The line plan usually comes first; the assortment plan deploys it across channels and locations.
- Both feed the buy plan, which converts depth-by-channel decisions into quantities, costs, and delivery timing.
- RetailNorthstar shares one model across line plan, assortment, and buy plan so changes flow downstream automatically.
See connected line and assortment planning in RetailNorthstar.