A restaurant renovation costs between 15 and 25 million rubles and three to four months of downtime. Most decisions about who to trust with that budget are made after scrolling through an Instagram feed.

This is not because restaurateurs are short-sighted. It is because the industry offers no other instrument. Designers sell photographs of completed spaces. Clients evaluate photographs. The system works exactly this way - until a beautiful space stops generating revenue.

There are three questions that shift this conversation from aesthetics to methodology. Almost no one asks them at the first meeting. The answers will tell you more about a studio's professionalism than any rating or award list.

A portfolio is a photo shoot. Not a business report.

When a restaurateur opens a studio's portfolio, they see beautiful shots. What they do not see: what happened to revenue after opening. What table turnover looked like six months later. Whether the average check went up or down.

This is not accidental. A designer's contract ends at project handover. The designer gets photographs for the portfolio. The restaurateur gets a space and figures the rest out alone.

49% of restaurants close within the first five years. Among the documented reasons: architectural errors - layouts that create bottlenecks in guest flow, zoning that works against turnover, square footage used far below its potential.

A real example from practice. In one Moscow restaurant, most of the budget went toward equipment and design details - resulting in 26 seats across 130 square metres. At peak hours the venue could not accommodate everyone who wanted to come in. The space was beautiful. The business ran at half capacity. Nobody asked about seating efficiency before the work began.

First question: what did you measure before starting the project?

This is a question about baseline.

If a designer did not know what was happening with the business before the renovation, they cannot know what changed after. No baseline, no accountability. The logic is axiomatic: if you did not record the temperature before treatment, you cannot claim the medicine worked.

Most studios begin with a brief - style, budget, timeline, client wishes. This is a reasonable starting point for aesthetic work. It is a weak starting point for designing a business tool.

Questions to ask the space before renovation: what is the current average dwell time during evening service? Where does staff lose time on the route from kitchen to far tables? Which zones underperform - and why there specifically? The answers shape the layout more precisely than any Pinterest references.

In our projects we build an operational matrix before any conceptual work begins. Target dwell time determines seating type. Peak load by time slot determines zone configuration. The ratio of alcohol in the average order influences the lighting decision - a separate dependency we explored in our article on restaurant lighting. This is not overcomplicating the process. It is the tool that lets us explain every decision with an argument, not a feeling.

What a designer should be able to answer: "We looked at zone occupancy by time slot, staff routing, and the ratio of seating types in the existing space. That gave us a baseline."

Weak answer: "We work from the client's brief - that's their domain." An honest position. Now you know what it means.

Second question: what changed in the business six months after your project?

This question almost always produces a pause.

Designers are accustomed to a different set of results: a magazine feature, an award, a client review at handover. These are legitimate results in a system that evaluates design by photographs. None of them say whether the restaurant started earning more.

In our observation, trends in restaurant design turn over every three to four years. Restaurateurs chasing relevance often renovate again before recovering the cost of the first project. An overly trend-driven interior is money spent twice.

What a designer should be able to answer: specific changes they know or tracked. Even approximate ones - the practice itself is what matters. "The client told us that evening dwell time increased six months later - and it shows in the revenue. The booth section fills first." That answer already shows the studio was thinking about outcome, not just delivery.

If the answer is "that's the client's zone, we don't track it" - not an error by any individual designer. The industry norm. Now you know what it means.

Third question: why this specific decision, and not another?

The type of seating affects guest behaviour more than almost any other environmental variable. Cornell University: booth seating along a wall - average dwell time 92 minutes, average check 18% above baseline. Open chair in the centre of the dining room - 58 minutes, check 8% below baseline.

This is data, not taste. Which means "where to put the booths" is not an aesthetic question. It is an operational one. A designer who understands this gives a different answer - not because they memorised the numbers, but because they think in the right categories.

The same logic governs every zone in the dining room: each one exists not for a beautiful floor plan, but to produce a specific guest behaviour. We explored the RevPASH calculation and table mix logic in our article on restaurant zoning.

"Why this decision?" is a filter. It separates taste from methodology. A designer ready to discuss the functional logic of their choices works differently from one who works on intuition. Both can reach the right result. Only one can be verified.

What a designer should be able to answer: the functional logic of the specific decision. "Booth seating here because this is an evening zone - we need guests to stay longer." Or: "High stools at the bar for lunchtime rotation - we don't want guests lingering in that zone past forty minutes." This is different from: "I like how it looks." Or: "It's what everyone's doing right now."

Why these questions are never asked

The answer is simple - and a little uncomfortable for the whole industry.

Designers are evaluated by photographs. Awards, publications, Instagram, ratings - all of it works with images. Business results don't fit in a photograph. A designer who produced a beautiful restaurant and got published in Dezeen is valued higher in the market than a designer with a less photogenic project but excellent turnover and a strong average check.

This is not a conspiracy. It is a structural problem: the industry has no mechanism for evaluating business outcomes. The AIA and RIBA introduced post-occupancy evaluation recommendations - but not a standard. Most designer contracts still contain no KPIs tied to financial project results.

Restaurateurs ask different questions because they don't know these exist. Guides online advise: look at the portfolio, check HoReCa experience, ask for references. Useful advice. It helps you choose the best designer among those who all work the same way.

The three questions in this article don't divide designers into "better" and "worse". They divide them into two different approaches. Which one you need depends on what you're building. A designer who wasn't expecting these questions but starts discussing methodology - that's already a different conversation.

In our projects we build an operational matrix before any conceptual work begins and collect feedback on key metrics after opening. This is not the industry standard - it is our approach to evidence-based design.