Data flow diagram A two dimensional diagram that explains how data is processed and transferred in a system. The graphic identifies each source od data and how it interacts with other data source to reach a common output Data models It is the formalisation and documentation of existing processes and events that occur during application software design and development. Data modelling techniques and tools capture and translate complex system design into easily understood representations of the data flows and processes. Modular programming It is the formalisation and documentation of existing processes and events that occur during application software design and development. Data modelling technique and tools capture and translate complex system design into easily understood representations of the data flows and processes. Structured programming It is the process of subdividing a computer program into separate sub-programs, Structured system design It is ...