A new dish can completely disrupt your kitchen during peak hours. What works fine during quiet moments causes chaos when you need to turn out 50 covers per hour. Here's how to measure dish efficiency before it costs you revenue.
What is kitchen efficiency for new dishes?
Kitchen efficiency measures how much time, space, and staff a dish requires during busy moments. A dish might be profitable on paper, but it'll cost you revenue if it slows down your kitchen flow.
💡 Example:
Your new risotto has 30% food cost - looks great. But during peak hours:
- Stirring takes 8 minutes of continuous attention
- Blocks 1 burner for other dishes
- Chef can't multitask during preparation
Result: 3 other orders fall behind
Measure prep time under pressure
Test your new dish during different levels of busyness. What you measure on Tuesday at 3pm won't match Saturday at 8pm - that's the kind of thing you only learn after closing your first month at a loss.
Track these specific times:
- Prep time (mise-en-place per portion)
- Active cooking time (chef working on this dish)
- Passive time (dish in oven/pan, chef can do other work)
- Finishing time (plating, sauce, garnish)
⚠️ Important:
Active time is crucial. If your chef's tied up for 5 minutes on one dish, other orders can't be made.
Calculate the impact on throughput
An efficient dish increases your revenue per hour. An inefficient dish costs you money, even if the margin looks good.
Formula for revenue impact:
Lost revenue = (Extra time per dish × Number of portions × Average check for other dishes)
💡 Example:
New dish takes 3 extra minutes per portion:
- Sales: 20 portions per evening
- Extra time total: 60 minutes
- Average check: €28
- In those 60 minutes: 4 extra tables possible
Lost revenue: 4 × €28 = €112 per evening
Test in practice with a trial period
Roll out new dishes with a 2-week test period. Measure the impact on your kitchen every single day.
What you track:
- Average wait time per table
- Number of complaints about slow service
- Stress level of kitchen team (ask them honestly)
- Number of dishes per hour (total, not just the new one)
💡 Example measurement results:
Before new dish:
- Average wait time: 18 minutes
- Dishes per hour: 45
With new dish:
- Average wait time: 24 minutes
- Dishes per hour: 38
Conclusion: Dish slows down the kitchen too much
Optimize or remove it
If a dish slows down your kitchen, you've got three options: adjust it, reposition it, or remove it completely.
Adjustment options:
- More prep ahead (less live cooking)
- Different cooking method (oven instead of pan)
- Simpler garnish
- Only offer on quiet days
Tools like KitchenNmbrs help you track food costs and prep times of new recipes, so you quickly see which dishes are both profitable and efficient.
How do you test a new dish for efficiency?
Measure all prep times
Note prep time, active cooking time, and finishing time. Test this during both quiet and busy moments to see the difference.
Monitor the kitchen during a trial period
Track for 2 weeks how the new dish affects throughput. Measure wait times and total number of dishes per hour.
Calculate the real costs
Add up food cost and lost revenue from delays. If total costs are too high, adjust the dish or remove it.
✨ Pro tip
Track your 3 most complex dishes during a Friday night rush for exactly 2 hours. If any dish takes more than 6 minutes of active prep time, it's slowing down your entire kitchen flow.
Calculate this yourself?
In the KitchenNmbrs app you can do this in just a few clicks. 7 days free, no credit card.
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Frequently asked questions
How long should I test a new dish?
At least 2 weeks, including a busy weekend. You need different busyness levels to see the real impact on your kitchen flow.
What if a dish is popular but slows down the kitchen?
Try simplifying the dish or only offering it during quiet times. Popularity doesn't help if you're making other guests wait longer.
What's an acceptable extra prep time?
Maximum 2 minutes extra active time per dish. More than that starts to noticeably slow down your throughput during busy periods.
Should I also factor in the cost of extra staff?
Yes, if a dish requires extra hands during peak times, include that in your cost calculation. Labor is your biggest expense after food costs.
📚 Sources consulted
- EU Verordening 852/2004 — Levensmiddelenhygiëne (2004) — Official source
- EU Verordening 853/2004 — Hygiënevoorschriften voor levensmiddelen van dierlijke oorsprong (2004) — Official source
- EU Verordening 1169/2011 — Voedselinformatie aan consumenten (2011) — Official source
- NVWA — Hygiënecode voor de horeca (2024) — Official source
- NVWA — Allergenen in voedsel (2024) — Official source
- Codex Alimentarius — International Food Standards (2024) — Official source
- FSA — Safer food, better business (HACCP) (2024) — Official source
- BVL — Lebensmittelhygiene (HACCP) (2024) — Official source
- Warenwetbesluit Bereiding en behandeling van levensmiddelen (2024) — Official source
- WHO — Foodborne diseases estimates (2024) — Official source
Food Standards Agency (FSA) — https://www.food.gov.uk
The HACCP standards shown in this application are for informational purposes only. KitchenNmbrs does not guarantee that displayed values are current or complete. Always consult the FSA or your local authority for the latest regulations.
Written by
Jeffrey Smit
Founder & CEO of KitchenNmbrs
Jeffrey Smit built KitchenNmbrs from 8 years of hands-on experience as kitchen manager at 1NUL8 Group in Rotterdam. His mission: give every restaurant owner control over food cost.
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