Summit Cty. Children Servs. Bd. V. Communication Workers of Am., Local 4546: The Supreme Court reversed the lower courts' judgment in this opinion authored by Justice O'Connor. Justice O'Connor agreed with the communication workers union in determining that because the collective bargaining agreement between the parties did not define what constituted "good cause" for disciplining an employee, the arbitrator was permitted to utilize a test for "good cause" that took into consideration the employee's work record and other mitigating circumstances.