 These techniques were combined in various published system development methodologies, including structured systems analysis and design method, profitable information by design (PRIDE), Nastec structured analysis & design, SDM/70 and the Spectrum structured system development methodology.Structured analysis is part of a series of structured methods that "represent a collection of analysis, design, and programming techniques that were developed in response to the problems facing the software world from the 1960s to the 1980s.In this timeframe most commercial programming was done in Cobol and Fortran, then C and BASIC.