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Plate waste is uneaten food left behind on the plate after a meal. Plate waste – like all food waste – burdens the environment. Plate waste – in contrast to other types of food waste – is absolutely unnecessary and almost entirely preventable. This study aims to synthesize past research on plate waste and outline a future research agenda.

Past research into plate waste is discussed, and the need for specific directions of future research is pointed out. A systematics of measures for the prevention of plate waste is offered which uses the following as criteria: the suitability of measures to the hospitality context; and whether the measure has been scientifically proven to be effective.

Plate waste research has a very short history. To date, efforts have been focusing on quantifying the extent of the problem. More theoretical work is needed to identify drivers of place waste and develop and experimentally test theory-based practical interventions to reduce the amount of plate waste generated.

The key contribution of this perspective paper is to synthesize prior work on plate waste and offer a future research agenda.

The study analysed the amount of plate waste in a university refectory in Izmir, Turkey to find ways of minimizing plate waste in the university, providing sustainability and contributing to the development of circular economy and raising awareness about the plate waste problem.

Observation and semi-structured interviews were used to determine the volume of plate waste and level of awareness of academicians, students and administrative staff and suggest sustainable solutions for food waste in university refectories. The data gained from the semi-structured interviews were analysed with qualitative analysis software (MAXQDA®).

Plate waste in the university's refectories is increasing due to the lack of precautionary measures. Academicians, students and administrative staff all showed low awareness rates.

This study is original in investigating theoretically and empirically one of the main reasons for food waste, namely plate waste in mass consumption sites, and evaluating the effect of food waste from an economic, social and environmental perspective.

This study aims to explore ways to minimize plate waste at university canteens by studying plate waste and consumers at three main canteens of a university, Thailand.

Using university canteens in Thailand as a case, plate waste was characterized and quantified and consumers’ insights concerning food consumption practices were examined through focus group discussion.

The results revealed that each consumer wasted edible food around 19 grams/meal. The generation of plate waste is affected by the food provision system, including canteen setting, food purchasing procedure and food quality. In addition, the presence of stray dogs in the canteens inhibited consumers from finishing up their food. Thus, improving the food provision system is crucial to engage consumers in achieving zero plate waste.

This research sheds some light on ways to engage consumers in sustainable consumption and contributes to the knowledge on plate waste and sustainable consumption in university settings. Improving food quality and canteen settings are of importance to better engage consumers. In addition, this research revealed that concepts of system of provision and citizen-consumers are practical to analyze sustainable transformations for green university initiatives.

The purpose of this paper is to consider the factors that influence food plate waste in a UK university food service setting and the insinuated intention to waste food among staff and students.

The study conducted empirical research using an online questionnaire (n=260) at the university. The data were analysed descriptively and inferentially by IBM SPSS Statistics version 22.

Multiple factors influence the level of food plate waste including gender, different categories of food, plate size, portion size and palatability. Two recommendations to reduce plate food waste in the university food service setting include providing a variation in plate size and pricing strategy by portion rather than a whole meal, and communicating with staff and students in the food service setting.

The research contributes, along with previous studies, by focussing here on participants’ food waste intention in food service settings and evidencing the factors of influence.

The research contributes to understanding on participants’ food waste intention in food service settings.

This systematic review (SR) aims to investigate plate waste quantity, determinant factors, and food waste costs in Indonesian hospitals.

This SR was conducted by searching for articles published on the Web of Science, PubMed, Emerald insight, ScienceDirect and hand-searching on nationally accredited journals in Indonesia which consist of 29 journals in nutrition, environment and public health. The inclusion criteria in this review were peer-reviewed articles, original research, research locations in hospitals in Indonesia and articles in English or Bahasa (Indonesian language).

There were 21 studies (17 observational studies and 4 experimental studies) included in this systematic review. Results from 17 observational studies showed that the median plate waste was 27.6% (14.8%–88.7%). High plate waste was found in this review, particularly in pediatric patients and patients who receive liquid diet orally. Staple food and vegetables have a high contribution to patients’ plate waste. Economic costs of plate waste were $0.07–$0.5 per capita per day. Determinant factors of patient’s plate waste were patient clinical conditions, food taste and environmental conditions of hospital food service. Results from four experimental studies showed that meal replacement and smaller food portion intervention could reduce significant plate waste. Nevertheless, there is no conclusive evidence for food waste reduction intervention because of small intervention studies in Indonesia.

There was a high disparity in the quantity of plate waste and economic costs between studies included in this review.

Improving food sensory and adjusting food portions particularly for staple food and vegetables can be done as a way to reduce patient’s plate waste.

This SR is the first review of Indonesian hospital plate waste.

Social marketing and other types of targeted behaviour change interventions should appeal to an individual’s personal values in order to improve their effectiveness. However, there is currently little understanding of what these values are in relation to food waste. The purpose of this paper is to identify the values underpinning the specific behaviour of plate waste created in a residential foodservice setting.

In semi-structured interviews (n=50) laddering techniques were used to identify links from behaviours through individual’s rationalisation for that behaviour to their personal values. The aim of the questioning was to uncover underlying drivers that lead to plate waste as well as those barriers to reducing it.

The values identified as being most important are hedonism and self-direction. The specific aspects of these values for plate waste reduction interventions are not compromising on the individual’s enjoyment of the meal and meeting their health goals. Effective interventions include pre-ordering meals, reducing food options provided, reducing plate size, removing food tray and finally, information campaigns to raise awareness.

The study provides insights into the personal values that influence behaviours resulting in plate waste. The study is the first to determine the links between this behaviour, rationalisations for that behaviour and personal values.

This study aims to highlight the impact of altruistic-self and hunger awareness on socially responsible food consumption through the lens of self-awareness and self-congruity theories due to the great challenge of Sustainable Development Goal 2: Zero Hunger.

A survey was conducted with a sample of 812 respondents. Exploratory Factor Analysis (EFA) and Confirmatory Factor Analysis (CFA) confirm each variable's structure through the measurement model and test the hypothesis to support a structural model.

The results highlight that the combination of altruistic-self and hunger awareness (AS-HA congruence) drives consumers to execute socially responsible food consumption. Meanwhile, consumers' food-saving attitude mediation translates to the attitude towards responsible and ethical use increasing socially responsible food consumption, a contextual development in the theory of congruence. Conversely, hunger awareness is not confirmed as significantly influencing socially responsible food consumption.

This research provides valuable insights for academicians and practitioners in developing food waste management strategies that can be implemented to reduce food wastage.

Food waste is a global concern and is challenging for many manufacturing, distribution and individual wastage levels. However, food wastage by consumers is one of the most critical problems which can be minimised with awareness and attitudinal changes in behaviour as a form of socially responsible consumption.

The purpose of this study is to investigate how hotel guests can be nudged for more active engagement in hospitality plate waste prevention and moderation at buffets, through designing effective persuasive interventions. Plate waste is a main sustainability challenge, and it is considered one of the major drivers of food waste in the hospitality sector, whose operations generate excessive amounts of waste. The hospitality industry, featured by all-you-can-eat buffet-style settings, is somehow encouraging consumers to increase the amount of food ordered or taken and not been eaten.

This study reports a field experiment conducted in a real hotel setting, where persuasive interventions were targeted to consumers at the croissants buffet, when guests were making their selections. The research tests the persuasiveness of functional and experiential appeal messages to nudge hotel guests towards a more active engagement in avoiding plate waste. Each single treatment was carried out for three weeks in varying sequence.

The findings are based on 63 rounds of data collections and show the superiority of experiential appeal messages in positively influencing guests’ behaviour. This implies that appropriate messages can persuade tourists to avoid plate waste in buffet-style settings, especially if these messages are grounded in participatory cues with an emphasis on altruistic values.

This is one of the few studies that empirically tests the effectiveness of different persuasive interventions in a real consumption setting, thus measuring actual behaviours which have been rarely studied. This study further contributes to the identification of concrete communication tools that can help to mitigate plate waste generation.

In the recent past, academic researchers have noted the quantity of food wasted in food service establishments in educational institutions. However, more granular inputs are required to counter the challenge posed. The purpose of this study is to undertake a review of the prior literature in the area to provide a platform for future research.

Towards this end, the authors used a robust search protocol to identify 88 congruent studies to review and critically synthesize. The research profiling of the selected studies revealed limited studies conducted on food service establishments in universities. The research is also less dispersed geographically, remaining largely focused on the USA. Thereafter, the authors performed content analysis to identify seven themes around which the findings of prior studies were organized.

The key themes of the reviewed studies are the drivers of food waste, quantitative assessment of food waste, assessment of the behavioural aspects of food waste, operational strategies for reducing food waste, interventions for inducing behavioural changes to mitigate food waste, food diversion and food waste disposal processes and barriers to the implementation of food waste reduction strategies.

This study has key theoretical and practical implications. From the perspective of research, the study revealed various gaps in the extant findings and suggested potential areas that can be examined by academic researchers from the perspective of the hospitality sector. From the perspective of practice, the study recommended actionable strategies to help managers mitigate food waste.

The authors have made a novel contribution to the research on food waste reduction by identifying theme-based research gaps, suggesting potential research questions and proposing a framework based on the open-systems approach to set the future research agenda.

As exploratory research, this project aimed to develop and assess the effect of implementing a food waste reduction program at a restaurant on a university campus.

Data collection consisted of an audit of both pre and postconsumer food waste to determine the effectiveness of various reduction strategies and a survey to assess attitudes of employees toward food waste. As exploratory research, a personalized database was created to track current food waste amounts and reasons for waste in the restaurant operation to determine if the same method could be employed in future research.

Overall, the restaurant in this study implemented various effective food waste reduction practices that were inexpensive and simple, resulting in a weekly average reduction of 14.3 pounds of food waste. The top five food item products wasted by the kitchen were also identified for both pre and postintervention phases as well as the reasons for generating kitchen waste. Furthermore, data reported on postconsumer waste included weight quantities and product types.

The project resulted in evidence that a personalized food tracking system is useful for identifying and quantifying food waste in foodservice operations. Therefore, the research design and data collection methods used in this project can be used in future research on a larger scale.