A prosthesis for a metacarpophalangeal joint comprises a metacarpal plug member, a metacarpal insert member, and a phalangeal insert member. The methods for making the aluminum-containing metallization structure are practiced by providing a substrate, forming a metal layer with an upper surface containing aluminum over the substrate, polishing the metal layer, and contacting the polished surface of the metal layer with a solution comprising water and at least one corrosion-inhibiting agent. When a resource becomes available, a batch service function determines, for each skill of the resource, the value to the contact center of having the resource presently serve communications needing that skill, and uses the conferencing function to conference a plurality of communications needing the skill having the highest value with the resource.