Complex sentence: The "spiral approach" is also a software development process dating from the early 1980s, first espoused by Barry Boehm and is currently incorporated as a method for more agile software development.
Split into simpler sentences: The "spiral approach" is also a software development process dating from the early 1980s, first espoused by Barry Boehm. This technique is currently incorporated in other software engineering methodologies, as a method for more agile software development.