Construction companies sometimes encounter excess commitments and since they work in partnership with other companies, they occasionally opt to work in collaborative construction contracts Construction contracting is normally a complex process that requires trust building among the parties due to time, project quality, and financial issues (Mead 2007). Projects undertaken through collaborative construction contracts have regularly attracted economic, legal, trust and accountability disputes. Estimating and Tendering for Construction Work explains the job of the estimator through every key stage, from early cost studies to the creation of budgets .