The role of Joinery Estimator can vary in responsibility depending on the size of the company. In larger firms, the role maybe more administrative, working off set calculation lists to price jobs. In small and medium-sized companies, an estimator will need more specialist knowledge in understanding wood and its characteristics as a natural material and the joinery production process. They calculate the total cost and time likely to be needed to make an item of joinery. The estimator may also have a customer-facing role, taking details, creating designs and estimating prices.