Proper retail sales analysis is what separates a buying plan from a guess. It is not about which products sold most in units or value, and it starts long before the season ends.
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Why Retail Sales Analysis Is Not an End of Season Task
Most buyers treat sales analysis as something that happens in the weeks after a season closes. By then, most of what you learn is only useful next year.
Analysis starts the minute your product reaches the shop floor. What you learn in the first three weeks lets you make decisions not just about that style, but about the rest of the season’s committed stock and everything still to be phased in. Waiting until the season ends means you have watched the information arrive and done nothing with it.
Weekly sales review meetings between the buying and merchandising teams are where this happens. They are not routine check-ins. They are the point where you track performance, spot emerging patterns and act on problems while there is still selling time left to recover them.
One more habit worth building. Apply in-season learning as soon as you can rather than saving every insight for the review. If week four tells you a shape is working and the colour is not, you may still have time to change what is coming, redirect stock between stores or adjust the visual merchandising. A review that only informs next year has captured half the value available.
Podcast Thrive in Fashion Buying & Merchandising
Episode 015, Reading Sales Reports Like a Pro: Spot Problems Before Your Boss Does.
Also on this topic:
Episode 010, Turn Your Sales Reports Into Buying Gold: The Data Analysis Method Pros Use.
If sales reports still feel like something you present rather than something you interrogate, that changes with structure. The Thrive in Fashion Buying and Merchandising course covers the full analysis cycle, from weekly trading review to post-season hindsight, with the reasoning behind each stage.
Keep a Lessons Learned Report
This is the single most useful habit a buyer can build, and almost nobody does it.
Keep a running record through the season of what happened and why. A late product development caused by unforeseen weather. Goods held at customs. A promotion that overperformed. Store feedback on fit. A quality issue caught at final inspection. Written down at the time, these become a historical record that lets you anticipate the same problems next season.
The reason it matters is simple. By the end of a season you will not remember why week nineteen was soft, and the number on its own will not tell you. Documented, that same week becomes a piece of evidence you can act on. Undocumented, it becomes a figure you explain away.
The Top Down Review Method
When you run a post-season review you are pulling information from several reports at once, and the order matters.
Start at the top and drill down. Category level first, which gives you the broad picture of what worked and what did not. Did certain categories outperform others, and was that a trend or a promotion driving it? Once that is clear, move down through subcategory to style, then colour, then size.
You do not need to go to style level on every line every season. You do need to do it at category and subcategory level, and you need to pay particular attention to sizes and selling ratios, so you are not repeatedly left with the same sizes at the end of a season.
It is also worth breaking the season down week by week and then month by month rather than looking at it as a single block. Timing anomalies only appear when you look at the shape of the selling curve.
Read the Product Alongside the Numbers
Do not run a review from the data alone. Have the samples in the room.
When you can see the garment, the reason a number is weak often becomes obvious within seconds. The hanger appeal is poor. The colour shade is slightly off against the rest of the story. The fabric handles cheaply against a competitor piece at the same price. None of that is visible in a spreadsheet.
This is also where you find your most useful information, and it is rarely in the best sellers. Acknowledge the strong lines and move on. The answers for future decisions come from the slow ones. Was there a style everyone was talking about that fell flat on the shop floor? Understanding whether that was the product, the price or the timing is worth more than another week analysing what already worked.
What Your OTB Reports Are Telling You
Reviewing sales without reviewing the stock position beside it gives you half an answer.
Your open to buy reports show how well you managed stock through the season. Two questions matter. Were you left with too much at the end, which points to overbuying or slower sales than planned across a number of lines? Or did you sell out too early, which suggests you underestimated demand or misread the selling pattern on particular styles?
Both scenarios are useful, and buyers tend to only treat the first one as a problem. Selling out early is a lost sales figure that appears on no report. This is where buying instinct earns its place. I have often heard less experienced buyers say they were nervous committing to something they had not bought before, which misses the point of the role. If the research is done and the strategy is sound, you should be able to back the styles you believe will trade. Nobody gets it right every time, and the job is to be right most of the time.
There is a wider point in this. The old approach to stock planning was largely instinct supported by a few simple metrics, and it is a risky way to run a category. Buying too much leads to markdowns that eat the margin. Buying too little means missed sales and a customer who found what she wanted elsewhere. Understanding what actually drove sales, and using that to inform the next decision, is the difference between a buyer who improves each season and one who repeats the same season with different product.
The Metrics Worth Watching
- Sell-through rate and rate of sale on your best selling lines, so you know what good actually looks like for your category rather than in the abstract.
- Gross margin by category, which tells you where profit is genuinely being made once markdown is accounted for.
- Average selling price. Aim for consistency season to season. Introducing too many low priced items to chase volume confuses your customer and devalues your stock over time, which damages brand credibility long after the season closes.
- Stock position against plan, read monthly rather than as a single closing figure, so you can see where the divergence started.
Five Steps to Run Your Next Review
- Document your lessons learned throughout the season. Insights, issues, feedback, delays. This is your primary resource at review time, and it cannot be reconstructed afterwards.
- Conduct a top down review. Category, subcategory, style, colour, size. Pay particular attention to size selling ratios.
- Identify anomalies at each level. Anything that behaved differently to expectation, in either direction, and work out why before you move on.
- Analyse your open to buy reports. Stock against plan, month by month. These figures drive the decisions and tell you whether the budget was managed well or simply spent.
- Build the strategic plan. Use what the analysis gave you to address the weaknesses and build on the strengths. This becomes the foundation of next season’s buy, which is why you are not starting from a blank spreadsheet.
Alongside this, keep watching your competitors. Not once a season, but continuously. If a competitor’s comparable product significantly outperformed yours, ask what drove it: a wider option count, better pricing, stronger marketing, or a product feature you did not offer.
Elisabeth's Final Thoughts
I love the creative side of this job, the research, the development, seeing product reach the shop floor. That is only half of it. The other half is the analysis that tells you whether the strategy was right, and the satisfaction of a strong sell-through is the confirmation that your reading of the market matched your customer’s. Each season builds on the last one, which means you are never starting from nothing. That only holds true if you did the review properly.
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Retail Sales Analysis FAQs
Work from the top down. Start at category level to see what broadly worked, then drill into subcategory, style, colour and size. Review the sales and stock positions from your open to buy reports alongside it, and keep the physical product to hand while you do it. The numbers tell you what happened. The garment usually tells you why.
From the moment product hits the shop floor, not at the end of the season. Weekly sales reviews let you act on what is happening while there is still selling time left. The post-season analysis then builds on a record you have kept all along rather than on what you can remember in week fifty two.
A running record kept through the season of what happened and why: late deliveries, customs delays, unplanned promotions, store feedback, quality issues. Written at the time, it becomes the most valuable document in your end of season review, because the details that explain a number are exactly the ones you forget.
Start with what underperformed rather than what sold, because the slow lines carry more information. Check whether you were left with too much stock, which suggests overbuying, or sold out early, which suggests you underestimated demand. Look hard at size ratios, and identify any style that was on trend and still fell flat, because timing is usually the answer.
Average selling price signals your brand position. Introducing too many low priced items to chase volume confuses the customer and devalues your stock over time. Keeping ASP stable season to season supports both brand credibility and profitability, so it is worth tracking as deliberately as sell-through.
