A bankruptcy judge on Thursday approved attrition programs that will be offered to more than 17,000 Delphi Corp. employees represented by its two largest unions, allowing the auto parts supplier to move forward on a second wave of buyout and early retirement offers.

Judge Robert Drain confirmed a motion by Delphi to offer attrition packages to about 8,500 hourly employees represented by its second-largest union, the International Union of Electronic Workers-Communications Workers of America, and 8,600 members of the United Auto Workers who were not covered in an earlier, similar program.