A fifth factor that can affect project costs is the quality of project management and communication. Project management is the process of planning, organizing, executing, monitoring, and controlling a project, while communication is the process of exchanging information and feedback among the project stakeholders, such as the owner, the contractor, the architect, the engineer, the subcontractors, and the suppliers. Project management and communication are crucial for ensuring the coordination, collaboration, and alignment of the project activities and objectives. However, they also require time, effort, and resources, which can add to the project costs. And poor project management and communication can lead to misunderstandings, errors, disputes, and delays, which can increase the project costs and jeopardize the project quality and delivery.