Kitchen operations · Capacity
The seat count is not the answer. A kitchen's real capacity is set by whichever constraint saturates first - equipment recovery, one overloaded station, holding space, or the air itself. Here is how to find your number and raise it.
The honest answer
Ask how many covers a kitchen can handle and the tempting answer is the seat count times the turns. The honest answer is that a kitchen's capacity is set by whichever of its constraints saturates first - and it is rarely the dining room. Seats, stations, equipment recovery, holding space, extraction, pass throughput and the brigade each have their own ceiling. The lowest ceiling is your number; everything above it is decoration.
A useful way to frame it: a 90-cover room turning twice on a Saturday asks the kitchen for 180 covers across roughly four peak hours - about 45 an hour, or a plate every 80 seconds sustained, with bursts far sharper than that. Whether that is comfortable or catastrophic depends entirely on what those plates are. Forty-five composed, seven-component plates an hour is a serious kitchen; forty-five burgers is a quiet one. Capacity is always covers-of-a-particular-menu, never covers in the abstract.
The audit
Every appliance has a burst rate and a sustained rate, and the gap between them is recovery. A fryer drops 20 to 30 degrees when a full basket lands and needs minutes to climb back; an oven crammed for the third consecutive firing runs slower than its spec sheet. Count your capacity at the sustained rate on the busiest station - usually the fryer or the grill - because that is the rate the eighth ticket in a row actually gets.
A station is one pair of hands, whatever the equipment behind it. Six burners mean nothing if one chef can realistically run four pans. Map covers per hour per station for your actual menu mix, and note the interlock: if 70 per cent of dishes touch the grill station, the grill chef is the kitchen's ceiling and everyone else's spare capacity is unusable.
Capacity is also the ability to buffer. Hot holding, a heated pass and sensible plating space let stations work slightly out of phase; a kitchen with no buffer needs everything to land simultaneously, which caps throughput far below the equipment total. If plates die waiting for table-mates, your constraint is sequencing, not cooking.
The least visible constraint is the one bolted to the ceiling. An extract system is designed - under the BESA DW172 specification - for a particular appliance line and heat load, with duct velocities that stop working properly when undersized ductwork pushes past around 8 metres per second. Add a chargrill or a second fryer without re-checking the extract and the kitchen may cook more but breathe less: heat builds, the gas interlock trips more readily, and the line slows. And a system that has quietly lost 30 to 50 per cent of its airflow to grease build-up has effectively shrunk your kitchen without moving a wall - worth ruling out with a proper look at the cleaning interval before concluding you have outgrown the site.
Raising the number
Once the constraint is named, raise it - and only it. If it is the fryer, a second fryer or a menu with fewer fried components beats any dining-room change. If it is the grill chef, cross-train a second pair of hands for the peak two hours. If it is holding, a heated gantry costs a fraction of a refit. If it is the air, a measured clean and, where needed, a fan or canopy remedial restores the ceiling the kitchen was designed with. Then re-run the numbers, because the constraint will have moved - capacity work is a cycle, not a project.
And resist the flattering number. A kitchen that can heroically produce 200 covers once will wreck food quality, staff and equipment doing it weekly. The number worth planning around is the one you can hit every Saturday for a year with the menu intact - your sustainable capacity, set by your slowest constraint on its worst night.
Menu design is the lever that costs nothing. Every dish that shares components, stations and cook-time bands with its neighbours raises the whole kitchen's ceiling; every outlier - the one dish needing a dedicated pan, a fourteen-minute cook and the only chef who knows it - lowers it. Before adding equipment, run the menu through that filter: trimming or re-engineering two awkward dishes has added more Saturday covers to more kitchens than any fryer ever has.
Questions
Rules of thumb float around - often 20 to 30 covers per chef per service for a mid-complexity menu - but they collapse across menu styles. A plate every 80 seconds of burgers and a plate every 80 seconds of composed plates are different kitchens. Map covers per hour per station for your actual menu instead.
Not safely, and often not legally. The extract system is designed to DW172 for a specific appliance line and heat load, and gas appliances are interlocked with the ventilation. Adding a chargrill or fryer without re-checking canopy capture and duct sizing risks a kitchen that cooks more but cannot breathe - and an interlock that keeps tripping.
Usually restoring what the kitchen already had: fix the firing logic, buffer with holding, and return the extract system to its design airflow. A grease-loaded system can be 30 to 50 per cent down, so a measured TR19 Grease clean often adds back more effective capacity than any single piece of new equipment.
Phoenix Duct Clean · by the numbers
Make sure the extraction can carry it. We survey and clean extract systems to TR19 Grease, restoring design airflow - overnight, with no extra charge for out-of-hours.