This document provides an overview of estimation and details the estimation process for wall panelling. It defines estimation as forecasting the probable cost of a project. There are two main types of estimates - approximate and detailed. The purpose of estimation is to determine the probable cost, make budget provisions, estimate time for completion, and help control expenditures. Wall panelling enhances appearance and function by covering walls. Materials used include wood, slate, metal, glass and fiberglass panels. A detailed estimate for wall panelling includes costs for materials like plywood, veneer, and adhesive, as well as labor costs.