Sample result
Yield Test Builder for Restaurants
The owner asked this:«I buy the rib at 24,000 a kilo and cost the sancocho at 110 grams against that price. My chef tells me it does not add up. I want to weigh it properly and know what the error has cost me.»
① The beef rib, weighed three times and not once
Three different lots from the same Medellín supplier, three shifts, the same scale. You take the median, not the best.
| Run | Gross weight | Trim and bone | Net raw | Factor |
|---|---|---|---|---|
| 1 · Monday | 10.0 kg | 2.4 kg | 7.6 kg | 0.76 |
| 2 · Wednesday | 10.0 kg | 2.2 kg | 7.8 kg | 0.78 |
| 3 · Friday | 10.0 kg | 2.6 kg | 7.4 kg | 0.74 |
| Median | 7.6 kg | 0.76 |
The purchase price is 24,000 COP/kg. Divided by 0.76, the NET kilo costs 31,579 COP. The old card costed 110 g at 24,000, that is 2,640 COP. Costed properly, that same portion is worth 3,480 COP.
Difference: 840 COP per sancocho. At 880 sancochos a month that is 739,200 COP, and 8,870,400 COP over the year. On one item, of one dish, on a two-location menu. Illustrative figures for this case.
② The five items measured, and the surcharge that was hiding
The hidden surcharge is one over the factor, minus one: what you overpay for buying gross and serving trimmed.
| Item | Purchase price | Measured factor | Price per net unit | Hidden surcharge |
|---|---|---|---|---|
| Hass avocado | 14,000 COP/kg | 0.63 | 22,222 COP/kg | +58.7 % |
| Cassava | 3,600 COP/kg | 0.69 | 5,217 COP/kg | +44.9 % |
| Chicken leg | 12,800 COP/kg | 0.75 | 17,067 COP/kg | +33.3 % |
| Beef rib | 24,000 COP/kg | 0.76 | 31,579 COP/kg | +31.6 % |
| Criolla potato | 6,900 COP/kg | 0.86 | 8,023 COP/kg | +16.3 % |
Once the cards for the three fastest-turning dishes are corrected with these five factors, the house's theoretical food cost rises 2.1 points. The kitchen did not get worse: the paper had been repeating a figure the scale will not hold up, and the declared 34 % stopped being a mystery.
And an honest concession: the avocado has the worst factor and the smallest weight in the plate, so correcting it moves little money. The expensive conversation is the rib. Rank by money, not by percentage.
The full example has 1 more part(s): you see them inside the library, with your account.