Multiply the length and width of the tile to determine its area. For example, a 4-inch by 4-inch tile is 16 square inches. Divide the area of one tile -- in square inches -- into the total you just calculated to determine the number of tiles you need.
Requirements management. Requirements management is the process of documenting, analyzing, tracing, prioritizing and agreeing on requirements and then controlling change and communicating to relevant stakeholders. It is a continuous process throughout a project. A requirement is a capability to which a project outcome should conform.
A system requirement is a description of the needs and desires for a system or application. A system requirement describes functions, features and constraints. Defining requirements is a primary function of a project manager but he or she isn't the only one actively involved in the process. During the requirements discovery process, project team members use fact-finding techniques to gain a better understanding of the requirements of the system.