R&R between PM and CM (SM) for the Construction?

Project Manager (PM or Project Director, PD) is a person who has the overall responsibility for the successful project operation and achieving project goals and objectives for the entire project lifecycle. A PM is responsible for development of the project goals and objectives, project organisations with the roles and responsibilities, and set up the specific project baselines including the project execution plans and key procedures with key project members in accordance with the company policy and contractual requirement ensuring the key issues of cost, time, quality and safety, and client satisfaction, and sharing with internal and external organisation. A PM is the only point of contact for the stakeholders and client communication, and may need to have: leadership; communication; fast work pace and decision making; complexity and problem solving; business acumen; planning; personal knowledge and experience; initiative and independence; adaptability; tolerance for stress; client focused, and so on.

Project Manager is the person who has the overall responsibility for the successful project operation including initiation, planning, design, execution, monitoring, controlling and closure of a project. The Project Manager is responsible for development of the project goals and objectives with key project team members in accordance with the company policy, and to share with internal and external organisation. The ability to adapt to the various internal procedures and project procedures and requirements, and to set up the specific project baselines including a project execution plan and key procedures to achieve the project goals and objectives. The Project Manager establishes the project organisation with qualified members, and share the roles and responsibilities for each team and members ensuring that the key issues of cost, time, quality and safety, and client satisfaction.

The Project Manager is the only point of contact for the stakeholders and a focal point for a client communication to determine and implement the exact needs of the client, based on the contract terms and conditions.

The Project Manager may need to have: leadership; communication; fast work pace and decision making, complexity and problem solving, business acumen, planning, personal knowledge and experience, initiative and independence, adaptability, tolerance for stress, client focused.

Site Manager (or Construction Manager) is an overall responsible person for the project construction management at the construction site. The Site Manager is required to keep within the timescale and construction budget of a project, and manage any delays or problems encountered on site during a construction period. Also, responsible for the managing of the quality control, HSSE (health, safety, security, and environment), and dealing inquiries and communications with consultants, clients, engineers, inspectors, and the public for the construction activities at the site. The Site Manager ensures that drawing and materials are delivered on time and construction resources are available on the work including the construction subcontractor, construction equipment and tools, and required procedures, and construction utilities, etc. The Site Manager involves the project initiation and planning stage as a home office construction planning before site activities are commenced, and responsible for managing communications between all parties involved in the site development of the project. 

Site Manager (or Construction Manager) is an overall responsible person for the project construction management at the construction site. The Site Manager is required to keep within the timescale and construction budget of a project, and manage any delays or problems encountered on site during a construction period. Also, responsible for the managing of the quality control, HSSE (health, safety, security, and environment), and dealing inquiries and communications with consultants, clients, engineers, inspectors, and the public for the construction activities at the site. The Site Manager ensures that drawing and materials are delivered on time and construction resources are available on the work including the construction subcontractor, construction equipment and tools, and required procedures, and construction utilities, etc. The Site Manager involves the project initiation and planning stage as a home office construction planning before site activities are commenced, and responsible for managing communications between all parties involved in the site development of the project. 

The main difference between these two positions are the level of responsibility and authority. The Site Manager (Construction Manager) directly oversees the day-to-day construction activities, while the Project Manager might supervise the Site Manager. The Project Manager has more authority and responsibility than the Site Manager. The Project Manager oversees the Project from initiation to completion, while the Construction Manager is responsible for the construction activities.