A field study showing how measurement revealed hidden costs, avoidable waste and opportunities for change.

Why Measure Food Waste?

Many restaurants believe they already have food waste under control.Portions are carefully managed. Teams are committed. Local and seasonal ingredients are prioritised. Sustainability is often part of the culture.Yet one important question remains:

How much food waste is actually being generated?

To explore this question, I conducted a field study in an independent Swiss restaurant. The objective was not only to measure food waste in restaurants, but to understand where waste occurred, why it occurred, and how data could support meaningful change.

Key Findings

• 150+ g of avoidable food waste per guest

• Equivalent to approximately one third of an average plate

• 40+ meals wasted every day

• CHF 100,000+ in annual value at stake

• Staff readiness to act increased from 62% to 100%

The Method

The objective was not simply to quantify food waste.

The study was designed to create visibility, engage teams and identify practical opportunities for improvement.

The approach combined:

• Field measurements over several weeks

• Waste categorisation and operational analysis

• Team discussions and awareness building

• A collaborative workshop to identify priorities and actions

By combining data and team engagement, the process helped transform food waste from an invisible issue into a shared operational challenge.

When Assumptions Meet Data

The findings challenged several assumptions.

The issue was not a lack of commitment.

The issue was visibility.What remains unmeasured stays invisible.

Although the restaurant had already implemented a number of sustainable restaurant practices, measurements revealed significant quantities of avoidable food waste throughout daily operations.

From Measurement to Action

Effective restaurant food waste management starts with data.

Before implementing food waste management solutions, teams need to understand where losses occur and which actions will have the greatest impact.

The study combined field measurements, team engagement and operational analysis to create a practical food waste management system tailored to the realities of restaurant operations.

Beyond waste reduction, the process generated valuable conversations around sustainability, operational efficiency and staff engagement.

Sustainable Food Waste Management in Practice

For sustainable restaurants, reducing food waste is not only an environmental priority.

It is also an opportunity to improve operations, strengthen team ownership and reduce costs.

Sustainable food waste management is therefore more than a reporting exercise.

It is a lever for change.

By making hidden losses visible, restaurants can improve performance while reducing their environmental impact and supporting the principles of the circular economy.

Depending on the type of waste generated, solutions such as food recycling, process optimisation and behavioural change can all contribute to more sustainable outcomes.

Measure. Reveal. Change.

Food waste management is not about collecting data for reporting purposes.

It is about creating the visibility needed to drive action.

Measure. Reveal. Change.