set_attribute_value [get_scan_elements -of_chain_families scanChain_1 ] -name cluster_name -value scanChain_1

set_attribute_value [get_scan_elements -of_chain_families scanChain_2 ] -name cluster_name -value scanChain_2

set_attribute_value [get_scan_elements -of_chain_families scanChain_3 ] -name cluster_name -value scanChain_3

set_attribute_value [get_scan_elements -of_chain_families scanChain_4 ] -name cluster_name -value scanChain_4