About one third of the food produced globally is wasted along the food chain, representing a burden for the environment and an inefficiency of the food system. Tackling food waste is a priority on the global political agenda to guarantee food security. Defining a methodology for food waste quantification is key to monitoring progress towards the achievement of reduction targets. This paper summarises the outcomes of a workshop on food waste accounting co-organised by the European Commission's Joint Research Centre and Directorate-General on Health and Food Safety with the aim of stimulating harmonisation of methodologies, identifying challenges, opportunities, and further advancement for food waste accounting. The paper presents methodological aspects, e.g. system boundaries, reliability of data, accounting of water flows, to ensure better support to food waste policy design and interventions. It addresses all the actors of the food supply chain, governments, and research institutions.

全球生产的食物约有三分之一在食物链中被浪费，这对环境造成了负担，并且导致食物系统效率低下。解决粮食浪费问题是保障粮食安全的全球政治议程的优先事项。定义食物垃圾量化方法是监测实现减少目标进展的关键。本文总结了由欧盟委员会联合研究中心和健康与食品安全总司联合举办的食品浪费核算研讨会的成果，旨在促进方法的统一，确定食品方面的挑战、机遇和进一步进步废物核算。本文提出了方法论方面的内容，例如系统边界、数据可靠性、水流量核算，以确保更好地支持食物浪费政策设计和干预措施。它涉及食品供应链、政府和研究机构的所有参与者。