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Publication date: 10 February 2025

Carles Sitompul, Theresia Gunawan, Nina Mesiranta, Elina Närvänen and Johanna Renny Octavia

This study aims to examine food waste behaviours among university students in Indonesia by adapting the theory of planned behaviour (TPB) alongside the theory of domains of…

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Abstract

Purpose

This study aims to examine food waste behaviours among university students in Indonesia by adapting the theory of planned behaviour (TPB) alongside the theory of domains of knowledge.

Design/methodology/approach

A total of 518 students at five Indonesian universities participated in an online survey, answering questions about their food waste behaviours based on the TPB and the domains of knowledge frameworks. Among them, 250 students had taken a course that covered the food waste topic, while 268 students had not taken the course. The data were later analysed by using partial least squares-structural equation modelling and measurement invariance across the composite models.

Findings

The findings reveal that environmental awareness, attitude towards food waste behaviours, subjective norms and different types of knowledge which are procedural knowledge, declarative knowledge, personal and social knowledge significantly influence food waste behaviour. Students who attended a course related to the food waste topic were more likely to align their intentions to reduce food waste with their reduction behaviour.

Originality/value

While previous research has highlighted the importance of the TPB in understanding food waste intentions and behaviour, studies also show that students’ knowledge about food waste plays a crucial role in shaping these intentions. This study builds on these insights by combining the TPB with the domains of knowledge theory, specifically looking at how participating in food waste-related courses influences food waste behaviours among Indonesian students.

Details

International Journal of Sustainability in Higher Education, vol. 26 no. 9
Type: Research Article
ISSN: 1467-6370

Keywords

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Article
Publication date: 16 August 2011

Carles Sitompul and El‐Houssaine Aghezzaf

The purpose of this study is to propose and formulate an integrated hierarchical production, and maintenance‐planning model.

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Abstract

Purpose

The purpose of this study is to propose and formulate an integrated hierarchical production, and maintenance‐planning model.

Design/methodology/approach

The proposed model is formulated mathematically and tested for some hypothetical cases. A two‐level planning is proposed to address the hierarchical planning problem, i.e. aggregate planning and detailed planning. A preventive maintenance planning is integrated into the aggregate planning, while machine breakdowns, which require corrective maintenance actions, are investigated in the detailed planning. The proposed general preventive maintenance model is tested against cyclical preventive maintenance models for some cases, and for evaluating the performance of the models, in terms of costs, and service levels.

Findings

The proposed general preventive maintenance model gives a better solution in terms of cost than the cyclical maintenance model (i.e. 6 per cent less costly), if the maintenance planning is executed separately from the production planning. In terms of service level, however, both models perform equally well with average service levels equal to 97.6 per cent. The effect of tight capacity, long maintenance duration, and small machine parameters similarly tightens the capacity. In these cases, it is shown that a stable level of capacity is more beneficial to achieve a better service level, which is gained if the preventive maintenance actions are carried out monthly.

Practical implications

At the aggregate level, the proposed preventive maintenance model considers a non‐cyclical planning, which means that the preventive maintenance periods do not necessarily fall at equally distant times. The inventory movement constraints at the aggregate level decouple machines to operate independently; hence the detailed level problem can be solved separately for each machine. In a rolling horizon approach, only the first period of the aggregate plan is implemented and disaggregated into the production of items at the detailed level.

Originality/value

The paper proposes an integrated model of hierarchical production and maintenance planning. A general preventive maintenance is integrated into the aggregate planning, while machine breakdowns are investigated in the detailed planning. To the best of one's knowledge, such a hierarchical view of production planning and maintenance has not been addressed adequately.

Details

Journal of Quality in Maintenance Engineering, vol. 17 no. 3
Type: Research Article
ISSN: 1355-2511

Keywords

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