End Of Life Scenarios Research Articles

A decision-making methodology for best product End-Of-Life scenario selection using an improved compromise ranking method

The development of environmentally sound products requires new paradigms and new approaches for the product development process. Responding to constantly more demanding legislation, manufacturers have to develop product End-Of-Life (EOL) scenarios. Very few studies are available in the literature dealing specifically with selecting the best product EOF scenarios. This is considered in this paper using an improved compromise ranking method in conjunction with an Analytic Hierarchy Process (AHP) and fuzzy logic. The method is developed considering the EOL scenario selection attributes and their relative importance for the industrial product considered. Two examples are included to illustrate the approach.

Development of a Set of Criteria as an Eco-Design Tool for Evaluation of Environmental Impact of Material Choice

Development of a Set of Criteria as an Eco-Design Tool for Evaluation of Environmental Impact of Material Choice Eco-design is part of the product design process aimed at reducing the environmental impacts of products during their entire lifecycle. Nowadays, the eco-design concept becomes more and more important, and it is also incorporated in the latest developments in legislation. However, with regard to the implementation of eco-design, many guidelines and tools still focus on the strategic level, but the practical tools are underdeveloped. In order to promote eco-design in the industry, there is a need for the further development of more practical tools, taking into account the scientific findings, but also making them applicable into a product design process. The intention of this paper is to present major considerations in order to develop a set of criteria for the material choice taking into account LCA studies and available data regarding environmental performance of materials. The proposed criteria system is based on three main criteria - toxicity, energy, recyclability, which corresponds to the main impact areas of material choice according to findings from the published LCA studies. These criteria are also linked to each other - e.g. with increasing recyclability one can decrease the energy content, as well as the toxic dispersion. The important innovation in this list of criteria would be that the product design - product structure -and use patterns (incl. end of life scenario) is linked to energy content, recyclability and toxicity. The next step would be development of the quantifiable values of this criteria system (expressed in 5 units), in order to make it more applicability of a quick screening tool in the product design process.

Selection of best product end-of-life scenario using digraph and matrix methods

This paper presents a methodology for the selection of a best product end-of-life (EOL) scenario using digraph and matrix methods. An ‘EOL scenario selection index’ is proposed to evaluate and rank the alternative product EOL scenarios. The index is obtained from an ‘EOL scenario selection attributes function’ obtained from the ‘EOL scenario selection attributes digraph’. The digraph is developed considering EOL scenario selection attributes and their relative importance for the considered product. An example is included to illustrate the approach.

How should a nurse approach truth‐telling? A virtue ethics perspective

Truth-telling is a key issue within the nurse-patient relationship. Nurses make decisions on a daily basis regarding what information to tell patients. This paper analyses truth-telling within an end of life scenario. Virtue ethics provides a useful philosophical approach for exploring decisions on information disclosure in more detail. Virtue ethics allows appropriate examination of the moral character of the nurse involved, their intention, ability to use wisdom and judgement when making decisions and the virtue of truth-telling. It is appropriate to discuss nursing as a 'practice' in relation to virtue ethics. This is achieved through consideration of the implications of arguments made by Alasdair MacIntyre who believes that qualities such as honesty, courage and justice are virtues because they enable us to achieve the internal goods of practices.

Amyotrophic Lateral Sclerosis: Ethical issues from diagnosis to end of life

The variable clinical course of Amyotrophic Lateral Sclerosis (ALS) confronts the clinician, the patient and caregivers with many ethical challenges from the moment of breaking the news of the diagnosis and throughout the relentlessly progressive trajectory of the disease. Each patient faces the prospect of life-threatening bulbar and respiratory muscle dysfunction that may ensue soon after disease onset or after months or years of progressive weakness. This reality eventually forces the patient to choose life extension via gastrostomy tube insertion, mechanical ventilation or both or to forego these treatments in favor of terminal palliative care. Faced with these prospects some patients contemplate voluntary cessation of food and water, physician assisted suicide or euthanasia. Depending upon the presence and severity of frontotemporal dementia (FTD) related to frontotemporal lobar degeneration (FTLD) the capacity to make these forced choices may be compromised. Clinicians caring for ALS patients should appreciate and communicate the significance of life threatening symptoms, monitor capacity for decision making, anticipate and manage multiple possible end of life scenarios, and aggressively manage symptoms.

Life cycle assessment of EPS and CPB inserts: design considerations and end of life scenarios

Expanded polystyrene (EPS) and corrugated paperboard (CPB) are used in many industrial applications, such as containers, shock absorbers or simply as inserts. Both materials pose two different types of environmental problems. The first is the pollution and resource consumption that occur during the production of these materials; the second is the growing landfills that arise out of the excessive disposal of these packaging materials. Life cycle assessment or LCA will be introduced in this paper as a useful tool to compare the environmental performance of both EPS and CPB throughout their life cycle stages. This paper is divided into two main parts. The first part investigates the environmental impacts of the production of EPS and CPB from ‘cradle-to-gate’, comparing two inserts—both the original and proposed new designs. In the second part, LCA is applied to investigate various end-of-life cases for the same materials. The study will evaluate the environmental impacts of the present waste management practices in Singapore. Several ‘what-if’ cases are also discussed, including various percentages of landfilling and incineration. The SimaPro LCA Version 5.0 software's Eco-indicator 99 method is used to investigate the following five environmental impact categories: climate change, acidification/eutrophication, ecotoxicity, fossil fuels and respiratory inorganics.

Multi-Criteria Decision-Making for Optimization of Product Disassembly under Multiple Situations

With growing interest in recovering materials and subassemblies within consumer products at the end of their useful life, there has been an increasing interest in developing decision-making methodologies that determine how to maximize the environmental benefits of end-of-life (EOL) processing while minimizing costs under variable EOL situations. This paper describes a methodology to analyze how product designs and situational variables impact the Pareto set of optimal EOL strategies with the greatest environmental benefit for a given economic cost or profit. Since the determination of this Pareto set via enumeration of all disassembly sequences and EOL fates is prohibitively time-consuming even for relatively simple products, multi-objective genetic algorithms (GA) are utilized to rapidly approximate the Pareto set of optimal EOL trade-offs between cost and environmentally conscious actions. Such rapid calculations of the Pareto set are critical to better understand the influence of situational variables on how disassembly and recycling decisions change under different EOL scenarios (e.g., undervariable regulatory, infrastructure, or market situations). To illustrate the methodology, a case study involving the EOL treatment of a coffee maker is described. Impacts of situational variables on trade-offs between recovered energy and cost in Aachen, Germany, and in Ann Arbor, MI, are elucidated, and a means of presenting the results in the form of a multi-situational EOL strategy graph is described. The impact of the European Union Directive regarding Waste Electric and Electronic Equipment (WEEE) on EOL trade-offs between energy recovery and cost was also considered for both locations.

Multiple criteria decision aid for selecting the best product end of life scenario

There exist several scenarios for treating an end of life (EOL) product and each scenario has different environmental, social and economic consequences. An EOL scenario can be better than another with respect to one criterion but worse with respect to another criterion. To compare EOL scenarios with respect to conflicting criteria, a multiple criteria decision aid (MCDA) method should be used. In this paper, we present the MCDA approach developed in the project AEOLOS (An End-of-Life of Product Systems) for supporting users in the selection of the best scenario for treating an EOL product on the basis of their preferences and the performances of the EOL scenarios with respect to relevant criteria.