Collection line plan

What is Collection line plan?

A collection line plan is an operating map of the planned offer: each row connects a style or family to variants, sizes, channel, timing, planning unit and working quantity. In fashion retail, assortment planning organizes seasonal styles across stores and channels while considering styles, sizes and colors; a line plan uses that logic as a collection decision grid.

The distinction from a collection map is the level of commitment. A collection map gathers intent, references and visual coherence. A line plan asks which options enter, where they will be offered and which decision must move forward. A product mix describes the composition of the set; the line plan records that composition as rows that can be reviewed.

How should breadth and depth be separated?

Start with one row per style or family and separate breadth from depth. Breadth is the number of style options; depth is the amount of variants, sizes or units assigned to an option. Do not put color, size range and total volume into one cell: they answer different questions.

A workable minimum grid can include style identifier, category, variant, size range, channel, delivery window, planning unit, planned quantity, owner, premise source and review date. These are working conventions, not a claim that every line plan requires the same software. The design can connect to PLM when a lifecycle system exists; IBM describes PLM as an end-to-end approach and highlights centralized product-data repositories for collaboration and course correction.

Quantity decisions also need context. Oracle distinguishes the merchandise plan, connected to budget and the total seasonal selection, from the detail of styles and channels. Link the line plan to the budget and to price architecture, but do not use the grid as a substitute for a budget, cost sheet, tech pack or forecast.

How do channel, calendar and review fit together?

Treat channel and calendar as decision dimensions, not loose notes. For every row, record whether the intent serves store, online, wholesale or another channel, along with delivery window and owner. Oracle notes that allocation can take channel or store performance, space and geography into account; that supports separating the overall grid from channel-specific allocation without turning a retail example into a universal rule.

The calendar should allow a review before commitment and a reading during the season. Assortment planning often occurs at least six months before a season and, in season, demand, daily sales and inventory can guide adjustments. In planning practice, mark the direction lock, sample approval, cost confirmation, buying decision and post-launch reading.

At each review, preserve the previous version, reason for change, responsible person and observed signal. A row can be developed, adjusted or removed; the record should not erase the hypothesis behind the choice. Demand planning can feed the discussion, but it is not the line plan itself.

What does a line plan not solve?

A line plan controls offer scope and decisions; it does not prove that a product was approved, produced, delivered or sold. It also does not replace a tech pack, prototype, quality validation, cost calculation, purchase order or performance reading. This boundary matters: a well-filled row may still depend on a sample, production capacity or a later commercial decision.

Use the document when a conversation needs to move from broad references to a comparable grid. If each team uses a different definition of unit, channel, date or quantity, fix the convention before comparing rows. The process is valuable because it makes choices, owners and changes explicit—not because it creates a spreadsheet that looks final.

How does it connect to neighboring documents?

A line plan connects collection map, product mix, price architecture, size range, demand planning and PLM, while each document answers a different question. Keeping those boundaries visible prevents a range grid from being used as proof of aesthetic intent, cost, capacity or sales performance.