In a network of workstations implementing a grid for sharing workstation resources while maintaining local workstation workloads, grid workloads are assigned to workstations depending on how busy they are with the local workload. With the improved approach, there is a high likelihood that an optimal replacement scheme will be found which requires the fewest number of cells to be replaced while still satisfying all of the TAR’s. A support member that receives a portion of a first wire and a second wire is received within the sheath. 1 to 60% of weight of ammonium formate. The outer lead ends are oriented to form a footprint which is not substantially larger than the dimensions of the semiconductor chip.