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.
The term requirement has been in use in the software engineering community since at least the 1960s. According to the Business Analysis Body of Knowledge (BABOK), a requirement is: A condition or capability needed by a stakeholder to solve a problem or achieve an objective.