Skip to main content
Use Case — Line Planning

The Collection's Structure Should Be
a Decision, Not an Outcome.

Line planning is the pre-assortment stage where style count, price architecture, newness ratio, and category balance are set as targets — before individual styles are selected. Without it, the line is defined by what makes it in, not what was planned.

RetailNorthstar connects line plan structure targets to OTB from day one — so the financial implications of style count and depth decisions are visible before the development list is locked.

Book a Demo →See assortment planning →
// What Goes Wrong Without a Line Plan

When structure is reactive, assortments underperform

The most common line planning failure is not a single bad decision — it's the absence of structural decisions that lets individual choices accumulate into an assortment that wasn't planned.

Style count grows beyond what OTB can support

Without a defined style count target at the start of planning, brands naturally add more styles than the OTB budget can fund at adequate depth. The result: every style gets insufficient inventory and the assortment performs worse than a tighter plan would have.

Newness ratio is set after the line is already built

Most brands don't define the carry-over vs. new introduction ratio before style selection begins. By the time the line is assembled, the ratio is whatever it is — not what the brand strategy requires. Adjusting it means removing styles that are already in development.

Price architecture drifts season over season

Without a price tier target set before product selection, brands find their assortment has drifted upmarket or downmarket relative to plan. Individual style pricing decisions, made without a category-level framework, produce a price architecture that wasn't chosen.

Category balance is reactive, not strategic

The ratio of tops to bottoms, knits to wovens, or core to fashion within a line should be a strategic decision. When category composition is determined by which styles make it into the assortment, the resulting balance is an accident — not a plan.

// RetailNorthstar for Line Planning

Line structure targets connected to OTB before style selection begins

Style count targets by category
Set the number of styles by category before product selection begins. OTB calculates the average depth per style available at that count — making the financial implications of style count decisions visible before they're locked.
Newness-to-carry-over ratio management
Define the target ratio of new introductions to carry-over styles at the line plan stage. As the assortment is built, the actual ratio tracks against target — surfacing the gap before the development list is locked.
Price tier architecture
Set price tier distribution targets (good, better, best) at the category level before individual styles are priced. Track actual IMU by tier as buy decisions are made.
OTB connection from day one
Line plan targets feed directly into the OTB model. When style count, depth targets, and price tiers are set at the line plan stage, the OTB framework is immediately calibrated — no separate financial model to reconcile.
Category and attribute composition
Plan the attribute composition of the line — tops/bottoms ratio, fabrication balance, color palette structure — before individual styles are assigned. Assortment decisions then fill the attribute framework rather than define it.
Carry-over performance inputs
Prior-season sell-through by style is visible during line planning, informing which carry-over styles merit continued development and which should be replaced with new introductions.
// FAQs

Line planning questions

What is line planning in apparel?

Line planning is the pre-assortment stage in apparel planning where a brand establishes the structural parameters of a seasonal collection before individual styles are selected. It determines how many styles will be offered, at what price tiers, in what category composition, and with what newness-to-carry-over balance. Line planning constrains downstream assortment and buy decisions — ensuring the collection's structure is strategic, not the accumulated outcome of individual style decisions.

What is the difference between line planning and assortment planning?

Line planning defines the structure and parameters of the collection: style count targets, price architecture, category balance, newness ratio. Assortment planning fills that structure with specific products: which styles, which colors, at what depth, in which sizes. Line planning happens first and creates the framework that assortment planning populates. Without a line plan, assortment planning starts without boundaries — and style count, price tier, and category balance are determined by what makes it in rather than what was planned.

How does line planning connect to OTB?

The line plan sets the style count and depth targets that determine the total OTB requirement. When a brand sets a line plan target of 80 styles at an average depth of 150 units, that immediately implies a unit commitment that can be compared to the available OTB. If the OTB doesn't support the planned depth at that style count, the brand must either reduce style count or accept lower per-style depth — a trade-off that is visible during line planning rather than discovered after the buy.

Related
Visual & Line PillarAssortment PlanningOTB PlanningSKU RationalizationLine Planning GlossaryBreadth vs Depth
// Get Started

Plan the line. Then fill it.

See how RetailNorthstar connects line structure targets — style count, price tier, newness ratio — to OTB before your assortment decisions are made.

Book a Demo →See Assortment Planning