PD IEC TR 62936 pdf free download

PD IEC TR 62936 pdf free download.Test method development – Guidelines for substance selection.
5 Process flow steps
5.1 Chemical substance list
Substances under consideration for test method development are found in the IEC 62474 materials declaration database and other readily available sources. The IEC 62474 database is generally the initial source of information since it provides a vetted and frequently updated list of substances that is under scrutiny by either having regulatory obligations associated with them or potentially will be in the future. Given the large number of substances either being regulated or under consideration for regulation, this database provides an effective screening of substances present in electrotechnical products. The IEC 62474 validation team is responsible for maintenance of the materials declaration database.
5.2 Substance filtering process
Given the large number of substances that are potential candidates for test method development, a systematic approach is needed for reducing the number of candidates for consideration before final selection. This can be accomplished by employing a filtering process. The basis of the filtering process is to apply a set of criteria that defines the timeliness and impact for test method development for a particular substance. Important categories for the filtering criteria include:
• presence of substance in the final product;
• regulatory or market requirements;
• regional impact;
• regulatory impact;
• intentional addition of substance;
• strategic or future impact;
• test method development.
Table 1 details the criteria and associated weighting factors to be used in the filtering process. Note that the criteria pertaining to “regulatory or market requirements” and “regulatory impact” are assigned scores based on the information used by the IEC 62474 validation team for assessing which substances are added to the database. For substances not listed in the database a similar assessment will need to be performed. The list of criteria and its relative weighting will be revised annually since the regulatory environment is dynamic. The weighting factors used are adopted from the Quality Function Deployment/Six Sigma methodology [3], [4]. Although the output from this process is a scoring for the substances under consideration, its intention is only to identify those substances where test method development would be most impactful or provide the most value to the electrotechnical industry. Technical Committee (TC) 111 will be tasked to determine, based on the scored list, which substances will be included in the final selection process.
5.3 Substance filtering criteria
5.3.1 Substance presence in final EEE product
This criterion is the first filter since the intent is to only choose substances that are expected to be present in the final end product. Substances that are used as process chemicals in the manufacture of the product but are either removed or chemically transformed in the final product are outside the scope of this process. This step is also one of the criteria used by the IEC 62474 validation team to determine its inclusion into the declaration substance list database.
5.3.2 Regulatory or market requirements
The regulatory status and timetable for enforcement of a substance may define the need for test methods to support conformity assessment. Reporting and/or restriction of a substance may require validation through chemical analysis. The greater the regulatory requirement is, the greater the need is for available assessment capabilities. For this document, the categorization of the substance criteria is taken from the definitions in lEG 62474 as defined by IEC Criteria 1, 2 and 3 (see Introduction). Additionally, the criteria are expanded to include voluntary requirements which may include some regulatory and non-regulatory requirements. Market requirements would fall under this category since they may also be an important consideration for test method development. Although they are not necessarily legal requirements in nature, they may greatly impact the ability of a product to enter a market. Examples of market driven requirements include the Low Halogen initiative, EPEAT® and others where substance type and concentration within a product may have defined allowable threshold values. Compliance to these market requirements are often used as a means for ensuring the procurement of EEE of demonstrated environmental “green-ness”.
5.3.3 Regional impact
This criterion defines the geographical impact of a regulation. The scope of a particular regulation has been defined in this criterion to be local, regional or global. The greater the geographical reach of the regulation the higher the assigned scoring for this criterion. For example, RoHS would be considered a global regulation although it originates from the EU. Many other countries particularly those in Asia are adopting their own version of RoHS. Although the details among the different country regulations may be different, the basic requirements are consistent. Alternatively, California Proposition 65 [5] is specific to products being sold in that locality. Its requirements are particularly unique with respect to the list of substances within its scope, the requirements concerning reporting, threshold levels and many others. For this example, it would be scored as a local impact since it is unlikely to be adopted outside of the United States in the foreseeable future.PD IEC TR 62936 pdf download.