Goal and Scope Definition in Life Cycle Assessment by Mary Ann Curran

By Mary Ann Curran

This ebook describes the significance of the objective and scope section for the total LCA learn. during this first section of the LCA framework (ISO standardized), the aim of the review is outlined and judgements are made in regards to the info of the economic procedure being studied and the way the learn may be carried out. making a choice on influence different types, class signs, characterization versions, and peer assessment is determined in the course of target and scope definition. The booklet offers functional counsel and an summary of LCIA tools to be had in LCA software program. even supposing now not laid out in the ISO criteria, Attributional LCA and Consequential LCA are provided to be able to safely verify the target and scope of an evaluate. The ebook closes with the interconnection among objective and scope definition and the translation section. instance objective and scope records for attributional and consequential LCAs are supplied within the annexes.

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In the sequence of processes used to produce resins that are used in the plastic containers and closures, some processes produce material or energy co-products. When the co-product is heat or steam or a co-product sold for use as a fuel, the energy content of the exported heat, steam, or fuel is shown as an energy credit for 14 Hunt RG, Sellers JD, Franklin WE (1992) Resource and environmental profile analysis: a life cycle environmental assessment for products and procedures. Environ Impact Assess Rev 12: 245–269 15 Boustead J (1992) Eco-balance Methodology for Commodity Thermoplastics.

Each recycling approach used in this analysis is described in more detail in the sections below. In these descriptions, the system from which the material is recovered is referred to as the ‘producer’ system, and the system utilizing recovered material is referred to as the ‘user’ system. It should be noted that all recycling allocations are based only on the burdens for the resin material and do not include any allocation of the burdens associated with fabricating the resin into a bottle or any other product.

S. process energy requirements are used, but production of process electricity was modeled based on that country’s electricity grid. The following table summarizes the model settings for the three example scenarios. For each drinking water system, the example scenario represents only one of the many combinations of parameters that can be modeled for each of the drinking water systems and is not meant to be interpreted as the most likely or most representative scenario for that system. 1A. 19 Selection of Subscenarios 48 subscenarios meet the following goals: • To capture scenarios that are believed to best represent typical practices • To demonstrate ‘best case’ or ‘worst case’ scenarios for selected systems to see if results for the different drinking water systems (bottled, tap, HOD) overlap at practical extremes • To explore compounding or offsetting effects of simultaneous variations in key parameters within systems • To identify parameters that have a large effect on results • To identify parameters which do not have a large effect on results at any level.

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