Estimating the generation of waste electrical and electronic equipment in organizations: the case of a Brazilian federal agency (Supplementary Material)

The generation of waste electrical and electronic equipment (WEEE) has become a globally serious problem. Its adequate management has great importance for governments and organizations alike. Despite the available literature on models for estimating WEEE generation, such analysis and forecasting are scarce in the context of big organizations. The objective of this research is to estimate WEEE generation in organizations using the Market Supply model applied to a Brazilian federal agency. The agency´s Asset Control System was the data source. These records allow organizations to effectively manage their WEEE, influencing the quality of generation estimate. A statistical analysis was carried to calculate the lifespan of the equipment in the system, observing a reduction in the lifespan of the most modern items. The model allows for estimating WEEE generation for the coming years in organizations, whilst providing lifespan profiles, meaning the probabilistic obsolescence rate of appliances. The results obtained, including the statistical analyses and the used methodology represent a valuable resource to organizations as a means to inform their decision-making process regarding the management of WEEE.

废电气和电子设备（WEEE）的生成已成为全球性的严重问题。对于政府及各类组织而言，其妥善管理具有重要意义。尽管关于估计WEEE生成模型的文献资料已有所积累，但在大型组织背景下，此类分析和预测却相对匮乏。本研究的目的是利用Market Supply模型对巴西联邦机构进行应用，以估计组织中的WEEE生成。该机构的资产控制系统作为数据来源。这些记录使得组织能够有效管理其WEEE，从而影响生成估计的质量。通过对设备在系统中的使用寿命进行统计分析，观察到最现代设备的使用寿命有所缩短。该模型能够对组织未来几年的WEEE生成进行预测，同时提供使用寿命概况，即家电的概然性过时率。所获得的结果，包括统计分析及所采用的方法，对于组织而言是一份宝贵的资源，有助于其就WEEE的管理做出决策。