Trello is a team collaboration tool that lets you organize anything and everything to keep your projects on task.
Prompt the reviewer with the purchase link before the request is due.
Your current reviewer receives a timely card link before a purchase request is due. Your team can see when the reminder went out.
Assign each purchase request to its authorized cost center reviewer.
Purchase requests reach the manager responsible for their cost center. Your team can see why that manager received the card.