Advertising is one of the tools and techniques for the PMI process to conduct procurements. It can be used to increase and broaden the procurement options. In some cases, it may be required by regulation. The advertisements may be targeted to a specific audience by placement in industry-specific magazines or professional journals. While the PMBOK (5th edition) only lists advertising as a tool for procurement, it can also be used to find other resources such as suppliers or project team members, especially subject matter experts.