Guide for interpreting life cycle assessment result 2016 eur 28266 en. Note that each question is imagined to be independent. Sensitivity analysis sa is a significant tool for studying the robustness of results and their sensitivity to uncertainty factors in life cycle assessment lca. Simapro help center using parameters for scenario analysis. An introduction to sensitivity analysis mit opencourseware. The tolerance value should be given in your design requirement. This course is intended for future lca practitioners read more applied lca in simapro. Methods for global sensitivity analysis in life cycle. Lifecycle inventory of manufacturing prefinished engineered wood flooring in the eastern united states february 2011 prepared by. One of the key applications of sensitivity analysis is in the utilization of models by managers and decisionmakers. There are a number of questions that could be asked concerning the sensitivity of an optimal solution to changes in the data.
Reporting your greenhouse gas emissions and setting reduction targets can be a great way to drive additional business value. Which impact assessment methods are available in simapro. In the sensitivity analysis of impact assessment methods the environmental impacts vary from 39% ap to 86% pocp if compared with those of the base scenario, while in the sensitivity analysis related to gwp, this indicator has a variation lower than 2. In simapro, parameters can be defined on database, project or process level. The objective is to reduce the likelihood of undertaking bad projects while not failing to. Figure 511 results of the sensitivity analysis by using a different dataset for the avoided primary production b2f scenario in denmark. Cradletogate life cycle analysis lca of ylangylang complete essential oil destined for cosmetic use from central region, ghana using the software simapro. Please refer to the introduction to lca with simapro manual for further information. Interactions within the lca calculation model and correlations within.
Recipe 2016 endpoint e recipe 2016 endpoint h recipe 2016 endpoint i. Lifecycle inventory of manufacturing prefinished engineered. You still have 7 spare saves to correct errors or to perform a sensitivity analysis. Imw2 software with database included and a general lca ecoinvent v. Life cycle assessment of gasoline and diesel produced via fast pyrolysis and hydroprocessing david d. Nov 28, 2016 input parameters required to quantify environmental impact in life cycle assessment lca can be uncertain due to e. Simapro manages to provide that transparency and reliability in a robust and userfriendly package, that can keep up with the constantly growing data coverage. Sensitivity analysis abstract sensitivity analysis provides users of mathematical and simulation models with tools to appreciate the dependency of the model output from model input, and to investigate how important is each model input in determining its output. Thoroughly substantiating the source of impacts and uncertainties is important, as is being able to provide a detailed sensitivity analysis.
Simapro, lca software package can help you make your. Introduction a crop model is the result of a long and complex construction process. Uncertainty and sensitivity analysis for crop models herve monod, cedric naud and david makowski 1. Guide for interpreting life cycle assessment result. How to do sensitivity analysis using cadence pspice simulation tool. Sensitivity analysis allows him to determine what level of accuracy is necessary for a parameter to make the model sufficiently useful and valid. Sensitivity analysis is especially valuable when the information is lacking to carry out a formal probabilistic simulation. Life cycle assessment of gasoline and diesel produced via.
A sensitivity analysis is included comparing to the vacuum decanting. Bowe 1 bergman is principal investigator and research forest products technologist, usda forest service, forest products. What is the difference between sensitivity and scenario analysis. This list below gives an indication of what is included. Indeed, research on methodology has shifted from formulation of ever more complex models to methods for assessing sensitivity. For our example, we had drawn a group of resistors powered by 12vdc supply. Simapro allows you to model from a life cycle perspective. In this method the individual parameters are analyzed. While modeling in simapro, using parameters can simplify your work and give you the flexibility to easily change values or assumptions in your model. Finding the most important assumptions is typically something that can only be done by experts. Sensitivity analysis suppose that you have just completed a linear programming solution which will have a major impact on your company, such as determining how much to increase the overall production capacity, and are about to present the results to the board of directors. Simapro contains a number of impact assessment methods, which are used to calculate impact assessment results. The simapro analyst and developer versions can run monte carlo analysis to determine the uncertainty in your results.
When to perform a scenario analysis vs sensitivity analysis. This course is designed to introduce students to the concept of life cycle thinking, and the iso standard methodology for conducting a lca, providing a handson experience learning in the simapro software. Math 340 a sensitivity analysis example from lectures. Comparative environmental life cycle assessment of conventional and electric vehicles troy r. In the demo you can use the monte carlo feature 4 times, to experience the clarity such an analysis can give. Comparative environmental life cycle assessment of. The impact categories considered were carbon dioxide emission and fossil oil consumption. Simapro license holders will get a printed version with their order. For all three scenarios, data inventories from the chosen system boundary were modeled in simapro 7. Gatetogate lifecycle inventory on hardwood sawmills in the northeastern region of the united states by richard d. Step by step guide for worst case analysis sensitivity analysis in pspice. Environmental research, development and innovation. Grid electricity accounts for 27% of the net ghg emissions in the base case. Gatetogate lifecycle inventory on hardwood sawmills in the.
Sensitivity analysis provides an invaluable tool for addressing such issues. Lca sensitivity analysis of a multimegawatt wind turbine e. Sensitivity analysis sa is a significant tool for studying the robustness. Linear programming notes vii sensitivity analysis 1 introduction when you use a mathematical model to describe reality you must make approximations. Carlo analysis for data uncertainties with sensitivity analysis for. Math 340 a sensitivity analysis example from lectures the following examples have been sometimes given in lectures and so the fractions are rather unpleasant for testing purposes. Pdf on jan 1, 2016, mark goedkoop and others published introduction to lca with simapro find, read and cite all the research you need on researchgate. Input parameters required to quantify environmental impact in life cycle assessment lca can be uncertain due to e. Build complex models in a systematic and transparent way using simapros unique features. Original research life cycle assessment of municipal solid. In this chapter we will address those that can be answered most easily. Sensitivity analysis can be used to find switch points critical parameter values at which estimated net benefits change sign or the low cost alternative switches. This thesis used both gabi and simapro software for lca case studies on emerging materials. Environmental research, development and innovation simapro.
The world is more complicated than the kinds of optimization problems that we are able to solve. Interpreting life cycle assessment for decisionmaking on. Sensitivity analysis abstract sensitivity analysis provides users of mathematical and simulation models with tools to appreciate the dependency of the model output from model input, and to investigate how important is each model input in. Cliope is an official partner of the simapro global partner network. Bergman a thesis submitted in partial fulfillment of. Perform sensitivity analysis on alternative assumptions. Ingredients of uncertainty and sensitivity analysis 57 3. The life cycle and system boundaries need to be equivalent, but not. Introduction to lca with simapro 1 introduction to lca with simapro 1. Methods for global sensitivity analysis in life cycle assessment. A sensitivity using biomassderived electricity shows significant improvement in ghg emissions. What is the difference between sensitivity and scenario.
It aims to provide evidencebased scientific support to the european policymaking. Life cycle assessment of municipal waste management. Simapro offers modelling with uncertainty calculation, insight in unit processes, allocation of multiple output processes, weakpoint analysis and complex waste treatment. Lci databases sensitivity analysis of the environmental. This is a subjective method, simple, qualitative and an easy method to rule out input parameters. Life cycle inventory data were collected and impacts were assessed using simapro software. For more information on these methods, please check the methods manual. Uncertainty of environmental impact can be analysed by means of a global sensitivity analysis to gain more insight into output variance. Why sensitivity and risk analysis project returns are spread over time costs and benefits are subject to uncertainty and may vary from the base case sensitivity and risk analysis is an analytical framework for dealing with uncertainty. How to conduct a proper sensitivity analysis in life cycle. This analysis is based on sensitivity analysis by performing lca calculations using two sources of inventory data. Sensitivity analysis in cmlca 1 perturbation analysis change each coefficient 1% and see how much the results change numerical or analytical key issue analysis decompose uncertainty of result into contributions by uncertainties in input data analytical or sampling with regression 57. Carbon footprinting is the first step to getting insight into all greenhouse gas emissions in the life cycles of your companys products. In practical applications, some additional aspects might be of relevance and deserve therefore attention.
Introduction to lca with simapro pre sustainability. Pdf sensitivity analysis of the environmental impact of. Uncertainty analysis in cmlca sensitivity analysis in cmlca sensitivity of lca results. Sensitivity analysis was performed to test the effect of modeling assumptions regarding vehicle composition, ef. This publication is a technical report by the joint research centre jrc, the european commissions science and. Gatetogate lifecycle inventory on hardwood sawmills in. Sensitivity analysis can also indicate which parameter values are. Lca sensitivity analysis of a multimegawatt wind turbine.
Sensitivity analysis to quantify uncertainty in life cycle. If you are located in argentina, please contact cliope. Uncertainty analysis in lca concepts, tools, and practice reinout heijungs. This study aimed to 1 give insight into and 2 compare methods. Cradletogate life cycle analysis lca of ylangylang. If the tests reveal that the model is insensitive, then it may be possible to use an estimate rather than a value with greater precision. Uncertainty and sensitivity analysis for crop models. It has been used in many software tools to support the calculation of lca e. This course is intended for future lca practitioners read more applied lca in. A sensitivity analysis comparing two methods, cmlia and. If the manual is to be used for other purposes, written consent of pre. In summary, the results presented in this paper indicate the necessity of.