Shielding effectiveness-why don't we have a consensus industry standard?

The discussion presented on the various shielding effectiveness measurement techniques for EMI shielding components shows the lack of industry consensus in this area. Efforts such as the IEEE EMC Society P1302 project will provide some help in the EMI gasket area. Similarly, the IEEE STD 299 revision effort may provide guidance in the smaller shielded enclosure area. ASTM D 4935 revisions and the new ASTM transfer impedance gasket test method should help as well. However, consensus industry standards do not exist for shielding effectiveness. Most ofthe established, legitimized measurement standards have limitations or shortcomings that have led to unrestrained and undisciplined modifications. It is time for those interested in shielding effectiveness measurement to get involved with standards developing organizations such as the IEEE EMC Society, to help create better EMI measurement standards.