In software engineering, domain analysis, or product line analysis, is the process of analyzing related software systems in a domain to find their common and variable parts. It is a model of wider business context for the system.

<systems analysis> 1. Determining the operations, data objects, properties and abstractions appropriate for designing solutions to problems in a given domain. 2. The domain engineering activity in which domain knowledge is studied and formalised as a domain definition and a domain specification. A software reuse approach that involves combining software components, subsystems, etc., into a single application system. 3. The process of identifying, collecting organising, analysing and representing a domain model and software architecture from the study of existing systems, underlying theory, emerging technology and development histories within the domain of interest. 4. The analysis of systems within a domain to discover commonalities and differences among them. (1997-12-26)

Feature oriented domain analysis (FODA) is a domain analysis method which introduced feature modelling to domain engineering. FODA was developed in 1990 following several U.