Social Life Cycle Assessment Studies Research Articles

Applying social life cycle assessment in the informal recycling sector: Understanding challenges and limitations

The transition towards Circular Economy (CE) is a promising approach to sustainable development that may cause significant social impacts. Despite the benefits of CE initiatives, key players such as informal recyclers face serious social issues such as poverty, lack of social security, and discrimination. Although evaluating social impacts remains a considerable challenge, Social Life Cycle Assessment (SLCA) is recognized as a suitable methodology with a life cycle perspective. While most SLCA experiences are conducted in the formal sector, it is important to consider the informal sector, which plays a crucial role in developing countries. This article presents an analysis of SLCA studies in informal recycling settings in order to identify the challenges and adjustments required for informal settings. The analysis is based on a literature review and a documentary review of a pilot application of SLCA in the informal recycling system in Cuenca, Ecuador. The results show that SLCA requires adaptation to be applied in informal settings. There are particular challenges in delineating boundaries due to the fuzzy nature and variability of informal activities. Tasks such as establishing specific indicators, developing reference scales and data collection, require careful planning and active stakeholder participation. For instance, indicators regarding Fair Salary or Working hours were adapted based on best practices. Furthermore, tasks such as verifying and disseminating results should be included in interpretation phases to generate long-term impacts and influence behaviors. The study underscores SLCA's multidimensional view but highlights the need for further standardization and adaptation for informal sectors.

Social Life Cycle Assessment in the Construction Industry: Systematic Literature Review and Identification of Relevant Social Indicators for Carbon Reinforced Concrete

AbstractThis article deals with the application of social life cycle assessment (S-LCA) in the construction sector and explicitly focuses on carbon reinforced concrete (CRC). The publication consists of two parts: (1) a scientific literature review on the current implementation of S-LCA in the construction sector, and (2) the definition of the relevant social hotspots for the cradle-to-gate production of CRC. The literature review was conducted to provide a general overview and compare S-LCA studies in the construction sector; second, countries that provide the relevant input materials needed for CRC were identified. Analysis within the Social Hotspot Database (SHDB) helped determine the relative importance of the CRC supply country for each social category and subcategory. By developing a metric in the form of scores for each risk information, the potential risks indicated by the SHDB were measured. The results show that the focus of the indicators to be highlighted and further used in the indicator catalog is particularly in the area of labor rights and decent work in the health and safety subcategory. Missing data within the SHDB may result in a defined high average score and lead to a lower level of information. In the future, the identified 36 social indicators for CRC should be revised again in cooperation with the manufacturing industry. This study aims to further raise awareness in the construction sector of life-cycle-based sustainability that goes beyond the environmental aspects, and it is the first social hotspot screening using the SHDB for CRC.

Assessing the social life cycle impacts of circular economy

A transition to a circular economy (CE) affects different stakeholders – positively and negatively. Social aspects still receive little consideration in the context of CE, which is why the assessment and monitoring of the social impacts of CE still require further development and consideration in research. In this context, social circularity indicators and social life cycle assessment (S-LCA) are important tools that were examined in more detail in this study. This paper aimed to assess the current state of social circularity indicators in the literature, the implementation of S-LCA to assess CE concepts, and which additional indicators might be included in future S-LCA studies. Focus will be on the methodological approach of how to assess the social impacts of CE. A systematic literature review was conducted using Scopus Database, Google Scholar, and Web of Science. The search terms were derived from the aim of the study to identify the social impacts of CE in existing literature, to compile relevant social indicators in the context of CE, and to analyze the current role of S-LCA in the assessment of CE concepts. 97 papers were found. After excluding contributions that did not match the search criteria and adding new relevant contributions found through the analysis of the identified studies with the snowball sampling approach, 40 papers were considered in the review. 40 social impacts of CE were found within the literature. About half of them were positive and the other half negative. The authors found that positive impacts for some stakeholders could imply negative consequences for others, e.g., job creation in one region might lead to a decline in job opportunities in other regions. To assess CE, 104 single social indicators and 9 composed indicators were identified. Most of them could be linked to stakeholder groups and subcategories proposed in the UNEP S-LCA guidelines (UNEP, 2020). Training and education, job creation, as well as health and safety were relevant identified indicators in the context of CE. S-LCA has rarely been used in the assessment of CE strategies so far and needs to be standardized for application in the industry. Not all social impacts of CE are addressed by existing indicators. This, and the fact that not all circularity indicators that address social consequences of CE (social circularity indicators) are covered with S-LCA, reveals the need to suggest and harmonize additional subcategories that are especially relevant for CE. The authors propose to apply and integrate the identified social circularity (inventory) indicators in future S-LCA studies to assess CE concepts.

Social Consideration in Product Life Cycle for Product Social Sustainability

Social life cycle assessment (S-LCA) is an emerging and pivotal tool for sustainability evaluation of products throughout their life cycle. Understanding deeply published papers helps to modify methods and identify research gaps. The aim of this study is to discover the existing gap in the S-LCA of products and to find the weaknesses of the approach. The method of performing the review was a narrative review where published papers from 2006 to 2020 were included through the use of the Web of Science and Scopus databases. S-LCA is considered to be relevant to a majority of sectors and processes (agricultural, industrial, technology, energy, and tourism). However, there is not sufficient research on evaluation of S-LCA on cereal crops and livestock output. It is indicated that, in the present S-LCA studies, there has been a lack of attention paid to the society and value chain actors and final consumer stakeholders. The elements of sexual harassment and employment relationships are not considered in SLCA studies. Italy has the largest amount of cases of S-LCA studies. The major challenges of applying S-LCA (by using site specific data) is data collection, which is time-consuming. It is recommended to evaluate a comprehensive sustainability assessment by adding cost of social assessment to LCA since there has been a lack of attention on assessment of cost in S-LCA.

Social life cycle assessment of an innovative industrial wastewater treatment plant

BackgroundThe social impacts generated by industrial waste treatment processes have not been studied enough, as shown in the literature. Social life cycle assessment studies have mainly focused on the assessment of products and less on industrial waste, especially wastewater, although potentially relevant from an environmental point of view, and also from a social one for various stakeholders.PurposeThis case study concerns the social assessment of an innovative technology to treat the wastewater of a microelectronics company. In order to produce electronic components and semiconductors, the company has to treat and dispose of relevant wastewater streams containing various toxic substances. The wastewater streams need to be treated in order to protect the eco-system, representing a high cost for the company and a potential impact on the environment.For this reason, the company developed a LIFE project to demonstrate the viability to decrease the burdens on water bodies. The positive outcome of the test on the pilot plant paved the way for the construction of the full-scale plant that will treat all the wastewater generated by the company.The objective of this paper is the socio-economic assessment of a full-scale plant designed to treat three different kinds of wastewater.MethodsThe assessment of socio-economic potential impacts of a new technology has been carried out through the PSILCA (Product Social Impact Life Cycle Assessment) database implementation to evaluate 65 social indicators of a wastewater treatment plant.ResultsThe line with the highest impact is the one which treats tetramethylammonium hydroxide; this is because this wastewater flow is the most abundant (14 and 43 times greater than the other wastewaters, respectively).The most affected stakeholder is the Local Community, followed by the Actors of the Value Chain; in fact, the results referred to the functional unit considered exceed 300,000 medium risk hours in both cases. For the Local Community this result arises from the indicator “Contribution to environmental load,” which is understandable considering the object of the study since this indicator includes health effects. As far as the Value Chain Actors stakeholder is concerned, the two indicators most impacted are “Corruption” and “Social responsibility along the supply chain”.The analysis conducted has also shown that upstream has a fundamental relevance for the social risks detected.ConclusionsConsidering the current lack of studies on both environmental and social impacts of wastewater treatment, and the fact that Social Life Cycle Assessment has not been widely used in this field, as emerged from literature review, this work is the first use of the PSILCA database to assess an industrial wastewater plant. The use of a social life cycle assessment database allows the value chain of a product system to be considered: the results show that most of the overall social risk derives from upstream sectors.

Locating Hotspots for the Social Life Cycle Assessment of Bio-Based Products from Short Rotation Coppice

The establishment of new value chains raises expectations in economic and social benefits. To determine whether these expectations can be fulfilled or whether there are also negative consequences, social aspects should be assessed as early as the R&D phase. Potential social impacts can be assessed with the help of a social life cycle assessment (SLCA). A common problem in SLCA studies is the large number of social aspects. Thus, it is important to prioritize the most relevant aspects. Scholars agree that socioeconomic indicators should not be selected on a purely intuitive and common sense basis and that a standardized approach is missing. A three-step process has been developed to identify the most vulnerable and relevant social aspects. These three steps were implemented into a case study to empirically test the method. Short-rotation-coppice as an alternative form of agricultural dendromass production is one possibility to obtain wood resources for the processing of bio-based products. The use of agricultural land for dendromass production promises additional income for the region’s farmers and job opportunities for the local population. The extant literature shows that the most frequently addressed impacts are related to workers’ health and safety aspects. The outcome of this study aims to support future research by identifying an appropriate approach for the selection of indicators in SLCA. For studies with a similar focus, the proposed set of indicators can be used as a framework in itself or serve as a basis for the choice of relevant social indicators.

Implementing the guidelines for social life cycle assessment: past, present, and future

This paper takes a critical review of the UNEP/SETAC (2009) Guidelines for social life cycle assessment (S-LCA) of products. This paper, therefore, poses the question: how can the future version(s) of the UNEP/SETAC Guidelines address the challenges associated with implementing case studies in the S-LCA? A systematic mapping review to investigate case studies in the S-LCA has been carried out in which the S-LCA was applied in order to analyse the application of the stages of the methodology. We appraise 58 case studies published between 2009 and 2019 in peer-reviewed international journals and analysed the trends and contributions in relation to the practice of the S-LCA. More published papers were collected between July 2018 and June 2019 (because of the publication of a Special Issue on the International Journal of Life Cycle Assessment in March 2018), and critically reviewed to identify key patterns and insights from the case studies. It was found that only 47% of the subcategories specified by the current UNEP/SETAC Guidelines are implemented in the case studies examined. Our review suggests four main initiatives that future S-LCA Guidelines should consider. Firstly, there is a need to encourage case studies that focus on the social impacts of “consumers” and “value chain actors” to understand better the opportunities for enhancing social sustainability considerations of marginalised stakeholder groups. Secondly, indicators cannot be homogenised across all sectors and disciplines, and the relevance of each indicator needs to be localised and justified in respective studies. Thirdly, there is a need for a robust theoretical orientation in the S-LCA—one that is more inclusive and flexible—to improve on contextual relevance in future case studies. Lastly, the revised Guidelines should aspire to provide more clarity on justifying the context and choice of functional units in S-LCA studies. The insights developed in this study are useful for practitioners and scholars involved in the S-LCA. The revision of the Guidelines can ensure that the S-LCA in future case studies can better create opportunities for improving the well-being of all stakeholders. It is instructive that both local contextualisation of indicators and establishing stakeholder concerns through participatory approaches will facilitate an improved understanding of the social impact assessment of products and their potentially positive and negative impacts along their life cycle. Addressing the challenges with the current Guidelines will ultimately strengthen the S-LCA by improving an understanding of relevant indicators, thus allowing for an improvement in social conditions for all stakeholders.

Social Life-Cycle Assessment of Household Waste Management System in Kabul City

The present study constitutes the first social life cycle assessment (SLCA) study in Afghanistan and aims at assessing the social performance of the waste management system (WMS) of Kabul city. The system boundary considered includes households generating the waste, the sanitation department of Kabul city, scavengers, recycling shops, the recycling factory, and the local community living in its vicinity. Compared to previous SLCA studies that consider one stakeholder per organization, we distinguished between the manager and the worker level for each organization. In total, eight stakeholders, 90 inventory indicators, and 20 impact subcategories were investigated. Results show three main social issues: the overwork of scavengers, recycling shop owners and recycling factories’ workers and managers, the absence of communication and implication of the local community, and the poor cleanliness of the surroundings of the recycling factory and collection points. At the sanitation department, managers were found facing more psychological stress and overwork than workers, demonstrating the current isolation of the department inside Kabul’s local government. It seems nonetheless possible to improve Kabul’s WMS by redesigning the location of garbage bins and conducting communication campaigns towards consumers and the local community. That would help to minimize the nuisances associated with the handling of waste and to integrate better waste management activities into the socio-economy of Kabul city.

Robust multi-criteria weighting in comparative LCA and S-LCA: A case study of sugarcane production in Brazil

This article presents a novel multi-criteria decision analysis (MCDA) model for performing robust indicator weighting in Life Cycle Assessment (LCA) and Social Life Cycle Assessment (S-LCA). This model integrates stochastic weights analysis with preference information that utilizes the value judgements of decision makers, benefitting from the diversity of interests and familiarities of decision makers regarding each indicator. The model considers all decision makers on an equal basis but does not assume they have the same importance. The MCDA model was applied to support the evaluation of the overall environmental and social impacts of manual and mechanical sugarcane harvesting in Brazil based on LCA and S-LCA. Brazilian experts were surveyed on the weights of relevant environmental and social indicators. The novel MCDA approach explores all the possible convex combinations of the weights provided by the surveyed group. The results of the MCDA model show that mechanical harvesting compared to manual harvesting had lower environmental life cycle impacts at the end-point level and better social impacts for all these convex combinations. Decision-making based on environmental impacts at the mid-point level is less clear: manual harvesting is more likely (67% of the convex combinations of the weights) to be considered better than mechanical harvesting; but the advantage of mechanical harvesting over manual harvesting can be greater than the reverse (almost twice as large). This article recommends presenting both mid-point and end-point LCIA results for a thoroughly informed decision-making. The MCDA model developed in this article can also be used to support weighting in future comparative LCA or S-LCA studies.

What are the sustainability principles guiding social life cycle assessment studies

Sustainable development (SD) and sustainability are considered the main goals of life cycle (LC) methodologies. This paper has a double purpose: first, to reflect upon the methodological diversity in social life cycle assessment (SLCA) approaches by paying attention to the theoretical underpinnings in terms of sustainability and SD concepts; secondly, to investigate possible links between the sustainability principles and the different type of SLCA studies. Therefore, a literature review has been conducted to investigate which have been the main sustainability and/or SD definitions that guided the authors in their LC studies and methodological proposals. Results showed that most of the references to sustainability and SD concepts are ascribable to three main schools of thoughts. We deduced a link between these main approaches of SD and the different types of SLCA, resulting in a different management of the research process (theory mobilised, methodology used, results provided).

Enhancing comprehensive measurement of social impacts in S-LCA by including environmental and economic aspects

Measurability becomes a key question in the assessment of the sustainability of products and services. As the LCA has proven its capability of measuring environmental sustainability over the last decades, the Social Life Cycle Assessment (S-LCA) seems promising as a way to cover the social dimension of sustainability within a similar framework. For operability reasons, working hours are commonly used as a single metric in product orientated S-LCA studies, even though major stakeholder groups are excluded by doing so. This paper shows how this shortcoming can be overcome through the introduction of the measurement of additional activity variables and explores different ways of implementing these variables. This work suggests introducing the activity variables Biophysical Pressure and Added Value in addition to the commonly used working hours of involved labour forces. Biophysical Pressure reflects the negative influence of the degraded natural environment on the affected humans in addition to the direct health effect covered by standard LCA. Added Value represents the potential benefits for stakeholders due to financial investments in production. The new activity variables are derived from the MRIO database “Exiobase” and coupled with social risk indicators from the “Social Hotspot Database”. Finally, the qualitative risk classes are transformed to quantitative units and normalized to allow for a better interpretation and an optional aggregation of the three variables into a Final Social Impact score. In order to test the method’s applicability, the social impacts of products and services from two different product systems were calculated and compared. Three t-shirts and four residential housing heating systems were assessed by the developed method and compared on the basis of their respective functional units. Major differences between the social impact measured only by working hours and social impact measured by the aggregation of the three quantitative units were observed, especially since the Added Value (social benefits) dimension and working hours contrasted regionally. While the concept is functional, there are limitations related to the MRIO inventory data and to the interpretation of results; therefore, sensitivity analyses were applied. The developed S-LCA method shows a promising way to extend the range of stakeholders affected by the life cycle of a distinct product by adding new variables. While constraints of MRIO data concerning detailed product system representation currently limit the approach, it allows one to identify potential social hotspots in complex product systems.

On the scientific justification of the use of working hours, child labour and property rights in social life cycle assessment: three topical reviews

PurposeWorking hours, child labour and property rights have been suggested as topics to assess in social life cycle assessment (SLCA). The purpose of this study is to investigate the scientific justification of the current use of these topics. The long-term aim is to contribute to the future development of SLCA.MethodsA literature review was conducted for each of the three topics. One thousand scientific articles were analysed for each topic, and relevant articles were selected. The articles were analysed based on whether the topics facilitated or obstructed beneficial social values, and whether they facilitated or obstructed adverse social values.Results and discussionThe results show that the three topics both facilitate and obstruct beneficial social values. They also show that the topics both facilitate and obstruct adverse social values. Considering the complex and ambiguous nature of these topics reported in the scientific literature, the current use of these topics in the SLCA literature is found not to be completely scientifically justified.ConclusionsBased on this study, the current use of working hours, child labour and property rights in SLCA studies should be questioned. We suggest that the fields of social science and economics may be fruitfully considered when seeking scientific justification for topics to assess in SLCA.

Identifying Social Impacts in Product Supply Chains:Overview and Application of the Social Hotspot Database

One emerging tool to measure the social-related impacts in supply chains is Social Life Cycle Assessment (S-LCA), a derivative of the well-established environmental LCA technique. LCA has recently started to gain popularity among large corporations and initiatives, such as The Sustainability Consortium or the Sustainable Apparel Coalition. Both have made the technique a cornerstone of their applied-research program. The Social Hotspots Database (SHDB) is an overarching, global database that eases the data collection burden in S-LCA studies. Proposed “hotspots” are production activities or unit processes (also defined as country-specific sectors) in the supply chain that may be at risk for social issues to be present. The SHDB enables efficient application of S-LCA by allowing users to prioritize production activities for which site-specific data collection is most desirable. Data for three criteria are used to inform prioritization: (1) labor intensity in worker hours per unit process and (2) risk for, or opportunity to affect, relevant social themes or sub-categories related to Human Rights, Labor Rights and Decent Work, Governance and Access to Community Services (3) gravity of a social issue. The Worker Hours Model was developed using a global input/output economic model and wage rate data. Nearly 200 reputable sources of statistical data have been used to develop 20 Social Theme Tables by country and sector. This paper presents an overview of the SHDB development and features, as well as results from a pilot study conducted on strawberry yogurt. This study, one of seven Social Scoping Assessments mandated by The Sustainability Consortium, identifies the potential social hotspots existing in the supply chain of strawberry yogurt. With this knowledge, companies that manufacture or sell yogurt can refine their data collection efforts in order to put their social responsibility performance in perspective and effectively set up programs and initiatives to improve the social conditions of production along their product supply chain.

Designing the social life cycle of products from the systematic competitive model

Changes affecting how product chains function can have a profound impact on human communities. Certain social life cycle assessment (LCA) methods aim to anticipate the important social effects of changes taking place in the functioning of a product’s life cycle. They therefore must identify the groups that are most affected. This paper aims to help identify the groups affected by competition beyond those usually highlighted. The objective is to propose rules to identify the organisations involved in the social life cycle of a product within a context of competition. Once these organisations are identified, it is possible to deduce which groups are affected. We analyse how published social LCA studies describe the product system and determine its boundaries. We deduce the necessity of constructing (1) a new model (the systematic competitive model) when there is competition and (2) a cut-off criterion (significant dependency). These allow us to describe the system and determine its boundaries, and thus to draw the social life cycle, in a context of competition. We conducted a simple case study (calculation of the number of rural jobs created/destroyed by a new agricultural filiere) in which two methods of representing a product system are compared. The first method is the value chain (which does not take into account the situation prior to the establishment of the planned new filiere), the second method introduces the systematic competitive model, which includes the short term effects of competition with the planned activities. The case study shows that it is possible to define the social life cycle by proceeding in this way. The two ways of representing the same real system produce very different results. The list of organisations affected and the nature of the impact to be assessed determine which actors are affected. The use of the systematic competitive model is indispensable when competition is intense. The organisations to be included in the boundaries of the social LCA (SLCA) study are those whose behaviour with social effects is significantly affected by the changes. Furthermore, there are numerous other phenomena linked to products that provoke important social impacts, but we do not yet know how to model them. They call for further research. Environmental LCA (ELCA) and SLCA studies of the same real system will be coherent, even if the descriptions of the system and the rules of fixing the boundaries differ, provided they reflect the same scenario.