The QS usually reports to Project Manager or Project Director and provides advice in the decision-making process throughout the management of a project from initial inception to final completion. QSs should be able to carry out estimating and measurement of construction works prior to tender, producing the bill of quantities; produce tender documentation and manage the tender process; clarify and
evaluate tenders; and manage the resultant contract through monthly valuations, variations control, contract administration and assessment of claims. Some QSs are trained in techniques of cost control. Those QSs who emphasise the cost discipline often use the term "Construction Cost Consultant". They ensure that projects are designed and constructed in such a manner as to secure value for money, cost certainty and programme dates. Others emphasise contracts management. Trained to draft, interpret and administer complex contracts, those QSs who operate in the broader field of project management often adopt other titles such as "Contracts manager" or "Construction surveyor". A number of QSs work in procurement in the oil & gas industry, process and power industries, and civil engineering. Their preferred title, in countries where the QS profession is less known, is "Contracts engineer". Some QSs specialise in project management and running multi-disciplinary projects, the QS background being a good foundation for understanding the complexities of modern large-scale projects. As well as in professional quantity surveying practices, the QS finds employment in all parts of industry and government including primary and secondary industry, national and local government bodies and agencies, contractors and subcontractors, developers, and financial and legal companies. Although all QSs will have followed a similar course of education and training (for those entering the profession today, this is usually to degree level), there are many areas of specialisation in which a QS may concentrate. The main distinction amongst QSs is between those who carry out work on behalf of a client organisation, often known as a "professional quantity surveyor", and those who work for construction companies, often known as a "main contractor's quantity surveyor".