Quantity surveyors provide cost management services throughout construction projects. They estimate costs, prepare bills of quantities, and advise clients on procurement and contractual methods. The Quantity Surveyor Certified Board regulates the profession and consists of a president, registrar, secretary, and 16 members appointed by the Ministry of Works. Quantity surveyors' responsibilities include cost planning, estimating, tendering, and certifying payments during construction stages. They help control costs, resolve disputes, and ensure projects are delivered within budget.