Set the decision boundary before using the numbers
Inputs and records to align
- One ingredient, menu item or waste category and one observation period. (not complete)
- Purchased, produced, sold, transferred and discarded units reconciled to the same measure. (not complete)
- Cost per wasted unit on a documented purchase, yield and recovery boundary. (not complete)
- Reason codes that separate spoilage, preparation loss, overproduction, returns and planned trim. (not complete)
- Intervention cost and realistic recoverable waste units as a labelled scenario. (not complete)
- Current price, contribution and sold units if a pricing response is compared. (not complete)
Build one transparent decision model
Net intervention value = recoverable waste units × avoidable cost per unit - intervention cost
- recoverable waste units
- Avoidable units the selected intervention could plausibly prevent (units per period) — waste records and explicit scenario
- avoidable cost per unit
- Cost not incurred if one waste unit is prevented (CU per unit) — purchase, recipe and yield records
- intervention cost
- Incremental training, equipment, labour or process cost for the same period (CU per period) — quote, invoice or user scenario
A price response requires a separate sold-unit and demand scenario. Do not add recovered cost and price revenue without checking whether they describe the same units.
- Reconcile quantities and classify waste by cause.
- Separate unavoidable yield from avoidable process loss.
- Calculate avoidable cost per unit without using selling price.
- Define one intervention and the units it could affect.
- Compare intervention cost with recovered avoidable cost.
- Use a separate contribution-and-demand scenario before choosing a price change.
Worked example: compare portion control with no change
Invented period: 80 recoverable waste units at 3 CU avoidable cost each and a 90 CU portion-control intervention.
| Line | Calculation | CU |
|---|---|---|
| Avoidable cost recovered | 80 × 3 | 240 |
| Intervention cost | entered for period | (90) |
| Net intervention value | 240 - 90 | 150 |
| Break-even recovered units | 90 ÷ 3 | 30 units |
| Case | Changed input | Result | Decision signal |
|---|---|---|---|
| Low recovery | 20 units | (30) | Do not proceed on economics alone |
| Break-even | 30 units | 0 | Review operational benefits |
| Base | 80 units | 150 | Test and measure actual waste |
Review the operational trade-offs before acting
- Applying one waste percentage to every ingredient or service period.
- Valuing waste at menu price rather than avoidable cost.
- Treating all trim, yield loss or unsold output as avoidable.
- Changing price before checking recipe, portion, storage, purchasing and production controls.
- Counting reusable or recoverable stock as final loss.
- Claiming an intervention caused improvement without a comparable baseline.
Decision questions
- Should I raise price to recover food waste?
- Only after identifying the loss mechanism. A price change applies to sold units and introduces demand risk; avoidable process loss may have a more direct response.
- What belongs in avoidable cost per unit?
- Include only costs not incurred when the waste unit is prevented, using the documented recipe, yield and purchase boundary.
Sources and methodology
- Inventory Waste Impact methodology — Margin101: Avoidable-unit, recovery and intervention-cost mechanics.
- Menu Pricing methodology — Margin101: Separate pricing, contribution and volume scenario boundary.
Test the editable scenario
- Inventory Waste Impact Planner
Measure contribution lost to spoilage, damage or expiry
- Menu Pricing Planner
Set a menu price from recipe yield and loaded portion cost
- Restaurant Menu Profitability Planner
Choose menu items and pricing from item-level contribution, popularity and operational burden