A quantity surveyor (QS) is a professional working within the construction industry concerned with construction costs and contracts.Services provided by a quantity surveyor may include: Cost planning and commercial management throughout the entire life cycle of the project from inception to post-completion Value engineering Risk management and calculation Procurement advice and assistance during the tendering procedures Tender analysis and agreement of the contract sum Commercial management and contract administration Assistance in dispute resolution Asset capitalisation Interim valuations and payment assessment Cost management process Assessing the additional costs of design variations Production of Company PQQ documentation in line with company policies.