Oversight

Oversight is an achievement/trophy

Requirements
Become the Overseer of Vault 88.

Ways to complete

 * Kill Valery Barstow at any time.
 * Expel Barstow from the Vault during the quest A Model Citizen.
 * Get her to leave through unsatisfactory experiment results.
 * Tell her it's okay to leave during the conversation that follows the quest Lady Luck.