If you sell fashion online, you’ve probably experienced some version of this scenario: the campaign performs well, sales go up, the product feed looks great, but inventory starts to get out of whack. You’re short on size P of a best-selling pair of leggings, have a surplus of size GG of a top that didn’t sell well, the logistics team delays a restock, customer service gets hit with shipping charges, and marketing keeps pushing a collection that operations can no longer support.
That’s where S&OP comes in: as a practical process to link sales forecasting, purchasing, production, restocking, campaigns, and shipping. Instead of each department making decisions on its own, everyone looks at the same data and coordinates what needs to happen before the collection runs out of stock.
What is S&OP, and why does it matter for an online fashion brand?
S&OP stands for Sales and Operations Planning. In practice, it’s a management process that integrates demand forecasting with supply planning to balance what the brand wants to sell with the resources it actually has: inventory, capital, production, suppliers, staff, shipping lead times, and logistics capacity.
The modern concept emerged in the 1980s and is attributed to Richard Ling, then a consultant at Oliver Wight, as noted on the page about sales and operations planning. Oliver Wight itself describes the origins of S&OP as a way to align supply and demand over the short term—the foundation of what later evolved into integrated business planning. The first book dedicated to the topic was *Orchestrating Success: Improve Control of the Business with Sales & Operations Planning*, by Richard C. Ling and Walter E. Goddard, published in 1988.
What’s the difference between looking at revenue and looking at operations?
Focusing solely on revenue is like looking at the scoreboard after the game has already started. You know how much you sold, which channel generated revenue, which campaign met its target, and which product came out on top. This is important, but it doesn’t show whether the sales were healthy for the operation.
Looking at operations means asking other questions. Did the sale generate a sufficient margin? Was the product mix balanced, or did it concentrate on just a few sizes? Does the best-selling product still have enough depth to handle the traffic? Does restocking arrive before or after the peak in demand? Can the shipping department handle an aggressive campaign? Does the supplier deliver on time?
In fashion, this distinction is huge because a product isn’t just an SKU. A single item has color, size, fabric, cut, margin, collection, sales curve, and inventory mix dependencies. If you look only at revenue, it seems like a success. But if you look at the operation, you might realize that the campaign depleted the best inventory, left behind hard-to-sell surplus, and forced an expensive restock.
This is the kind of problem that arises when sales, inventory, and operations aren’t on the same page. For further reading, see “The Three Costs of Poor Planning in Fashion E-commerce: Excess, Shortage, and Rush.”
Who needs to be at the S&OP table at a fashion brand?
The classic S&OP cycle is monthly and consists of five stages: data collection, demand planning, supply planning, pre-meeting, and executive meeting. Traditionally, marketing, production, engineering, finance, and materials teams participate. At an online fashion brand, you can simplify this without overcomplicating things.
The table must include the people who decide on or influence sales, products, and delivery. At a small brand, this might be three people wearing multiple hats. At a larger brand, they might be separate leaders. The important thing is that no critical decision is left out of the conversation.
- Brand owner or management: sets priorities, defines acceptable risk, determines available cash, and makes final decisions.
- Product or style: provides insights into the collection, model selections, colors, fabrics, sizing, and launch schedule.
- Purchasing, production, or manufacturer relations: provides information on deadlines, capacity, minimum order quantities, bottlenecks, and restocking feasibility.
- Marketing and performance: provides the campaign schedule, channels, budget, creative assets, traffic projections, and products to be promoted.
- E-commerce and CRM: covers conversion rates, purchasing behavior, repeat purchases, waitlists, shopping carts, internal searches, and most-wanted products.
- Operations and logistics: details picking capacity, packaging, shipping, delivery times, exchanges, and returns.
- Finance: Sets cash limits, margins, working capital needs, and the impact of discounts.
If your brand doesn’t yet have all these areas structured, that’s okay. The mistake is deciding on campaigns, purchasing, and production in separate discussions, each with a different version of the truth.
How can you adapt the five stages of S&OP for collections, product lines, and restocking?
The best way to apply S&OP in fashion is to transform the five classic stages into a routine tied to the brand’s commercial calendar. It doesn’t have to turn into an endless meeting. It needs to drive decision-making.
- 1. Data collection: What actually happened? Before discussing opinions, the brand needs to gather the basic data: sales by product, color, and size; available inventory; slow-moving items; assortment gaps; margin; returns; active campaigns; top-searched products; waitlist; backorders; supplier lead times; and shipping capacity.
- 2. Demand planning: What do we believe will sell? Marketing, e-commerce, product, and management discuss expected demand. Which items will take center stage over the next two weeks? Which campaign will receive funding? Which new release deserves special attention? This plan must align with the collection’s architecture—a topic you can explore further in “Collection Architecture in Fashion E-commerce: How to Organize Products Before Selling.”
- 3. Supply Planning: Can we sustain these sales? Here comes the question that prevents a lot of headaches: Do we have enough product to meet the plan? If the campaign is promoting a fitness set, is the product lineup complete? Is there fabric available for restocking? Can the manufacturer deliver on time? Do we have the capital to produce now? Can the operation ship the expected volume?
- 4. Pre-meeting: What conflicts need to be resolved beforehand? Before the final meeting, the departments involved must resolve any conflicts. Marketing wants to invest in a piece with almost no markup. Product wants to launch a new capsule collection, but Operations is still dealing with backlogged orders. Finance wants to reduce purchases, but E-commerce sees a risk of stockouts.
- 5. Executive meeting: What gets decided? At the end of the cycle, clear decisions must be made: what to buy, produce, restock, pause, liquidate, promote, remove from advertising, keep on the calendar, and accept as a risk.
How often should a small brand conduct S&OP?
The classic cycle is monthly, and this pace continues to make sense as a baseline. Once a month, the brand reviews its collection, demand, inventory, production, campaigns, cash flow, and operations with a broader perspective. This meeting should look ahead to the coming weeks and align decisions with the commercial calendar.
But online fashion changes quickly. For this reason, small brands often need a shorter follow-up between cycles. You don’t need to hold a full S&OP meeting every week; a 30- to 45-minute operational check-in to see if the assumptions are still valid will suffice. Did the campaign sell out faster than expected? Did the product lineup fall apart? Was the manufacturer’s delivery delayed? Did media costs rise?
A simple routine might look like this: a monthly S&OP meeting for major decisions and a weekly check-in to adjust course. During peak periods—such as collection launches, Black Friday, Mother’s Day, or the height of summer for beachwear—the frequency can be increased. If your brand struggles during these peak periods, the guide “Black Friday for Fashion E-commerce: The Complete Checklist to Avoid Leaving Money on the Table” can help bridge the gap between planning and execution.
How can you tell if S&OP is working for your fashion e-commerce business?
S&OP is working when the brand begins making decisions before problems arise with cash flow, inventory, or customer service. You’ll notice less improvisation, fewer misaligned campaigns, fewer last-minute restocks, and fewer purchases based solely on gut feeling.
It’s also worth tracking simple metrics: stockouts on key products, excess inventory per collection, the time between identifying demand and making a restocking decision, delayed orders, returns due to size issues, campaign margins, and the revenue share of products with a healthy product mix. A single number alone solves nothing; the value lies in discussing the cause and deciding on a course of action.
If a high-selling top starts selling very well in sizes P and M, but sizes G and GG aren’t moving, S&OP needs to drive decisions. Should we repeat the same sizing chart? Adjust the messaging? Photograph it on a different body type? Revise the pattern? Pause media spending? This type of discussion connects data, product, marketing, and operations. For decisions related to size and returns, see also “Size Charts in Fashion E-commerce: Why They Reduce Returns and How to Create Your Own.”
If your brand currently feels that marketing, inventory, production, and shipping are still operating at different paces, perhaps the first step is to take a look at the entire operation with someone from outside the day-to-day routine. WX3 can help identify where the collection is getting stuck and which decisions need to be integrated; if it makes sense, schedule a free assessment of your e-commerce business.