The question behind the question When someone asks me whether they should change their retail format, they are usually asking something else entirely. They are asking: is my business model still working? Those are different questions. Format is the container. The model is what goes inside it. Confusing the two leads to expensive mistakes. I have seen people spend £40,000 refitting a shop when the real problem was their pricing. I have also seen people stubbornly defend a format that stopped making sense years ago. Both are painful to watch. So before you start sketching new layouts or looking at self-service options, work out which question you are actually trying to answer. What format actually means Format is how your product reaches the customer. It includes the physical space, the service model, how stock is displayed, and how transactions happen. A bakery with a counter and staff handing over items is one format. The same bakery with self-service cabinets is another. Same products, different format. Greggs recently started rolling back their self-service cabinets in certain locations because of theft. That is a format decision driven by operational reality. The food did not change. The way people accessed it did. Format decisions carry real weight because they affect staffing, stock management, customer experience, and shrinkage all at once. Changing format is not like changing your opening hours. It touches everything. Three signs your format might be broken First: your conversion rate is falling but your footfall is stable. People are coming in and leaving without buying. That suggests something about the experience is putting them off. It could be queues, it could be layout, it could be how they interact with staff or products. Second: your shrinkage is climbing faster than your sales. If you are losing more stock than you are selling, your format might be making theft too easy. This is exactly what drove the Greggs change. The economics of self-service only work when most people pay. Third: your labour costs are rising but your service scores are not. You are paying more people to do something that is not translating into better customer experience. That often means the format is creating unnecessary friction. None of these on their own mean you must change format. But two or three together? Worth a serious look. Three signs your format is fine but something else is wrong First: your competitors using the same format are outperforming you. If they can make it work and you cannot, the format is not the problem. Second: your margins are tight but your volume is healthy. That is a pricing or cost issue, not a format issue. Changing how customers access your products will not fix what you pay for them. Third: your best performing days are when the format works as designed. If Saturday mornings run smoothly and profitably, the format is not broken. Something else is happening on the slow days. I worked with someone last year who was convinced they needed to move to click and collect. We ran the numbers. Their busiest, most profitable days were walk-in trade. The problem was Tuesday and Wednesday, and that turned out to be a marketing problem. They did not need a new format. They needed a reason for people to come in mid-week. How to actually decide Start with the numbers, not the feeling. Pull 12 weeks of data. Look at conversion, basket size, shrinkage, labour cost per transaction, and customer complaints. If you do not have this data, that is your first problem to solve. Then isolate the variable. If you think self-service would help, find a comparable business that uses it and compare their metrics to yours. Not their revenue. Their unit economics. Run a scenario. What would your P&L look like if you changed format? Factor in the refit cost, the training, the transition period where everything runs worse before it runs better. Be honest about the timeline. I have never seen a format change pay back in under 18 months. Finally, pressure test your assumptions. If you think customers want faster service, ask them. Not with a survey. Stand in your shop and watch. Time the transactions. See where people hesitate. At ALIRA. we use a decision matrix for exactly this kind of choice. You list your options, weight the criteria that actually matter, and score them. It forces you to be specific about what you are optimising for. You can build one yourself or use the template at alira.london. The cost of getting it wrong Format changes are not reversible without significant cost. If you move to self-service and it does not work, you cannot just put the counter back. You have trained customers to expect something. You have changed your staffing model. You have spent the money. The average small retail refit in London runs between £15,000 and £60,000 depending on scale. That is money you cannot spend twice. Getting the diagnosis right before you start is not cautious. It is basic. What to do this week Pull your last 12 weeks of sales data and calculate your conversion rate, average basket size, and shrinkage percentage. If you cannot calculate all three, fix that first. Spend one hour standing in your space during a busy period. Do not serve anyone. Just watch. Note where customers pause, where they abandon, where they ask questions. Write it down. List three businesses using the format you are considering. Visit them. Time a transaction. Count the staff. Notice what works and what does not. Compare what you see to what you assumed.