Volumetric enclosure provides methods andor apparatus for teaching, generating and deriving supply chain efficiency improvement. Such test packets can have programmable headers, payloads, and duty cycle. The method further includes transmitting the call signaling message to a second remote element. The algorithm uses less computer power and combines the benefits of Exact Algorithms and Approximate algorithms. 5 m2g and a particle size distribution determined to ASTM B 822 corresponding to a D10 value of 5 to 25 \u03bcm, a D50 value of 20 to 140 \u03bcm and a D90 value of 40 to 250 \u03bcm, wherein the powder does not comprise an effective content of sintering protection agents. The sputter target assemblies in accordance with the present invention are preferably comprised of target materials and backing plate materials having dissimilar thermal expansion coefficients and incorporate internal cooling channels.