Question:

You are working on a project that included multiple vendors. One of the vendors has been difficult to operate with and is not very cooperative. You have received the latest invoice from them for services and disagree with them about the charges they have listed for the change request that was submitted last month. When you called and spoke with your representative at the company, they didn’t approve to budge on the charges. You will likely need to use an alternative dispute resolution (ADR) to gain to the bottom of this matter. Which tool and technique of the Control Procurements process does this question reflect?