The waterfall model The classic way of looking at S.E. that accounts for the importance of requirements, design and quality assurance. The model suggests that software engineers should work in a series of stages Before completing each stage, they should perform quality assurance(verification and validation) The waterfall model also recognizes, to a limited extent that you sometimes have to step back to earlier stages www.oseng.com O Lethbridge/Laganiere 2001 Chapter Il: Managing the Software Process 8© Lethbridge/Laganière 2001 Chapter 11: Managing the Software Process 8 The waterfall model The classic way of looking at S.E. that accounts for the importance of requirements, design and quality assurance. • The model suggests that software engineers should work in a series of stages. • Before completing each stage, they should perform quality assurance (verification and validation). • The waterfall model also recognizes, to a limited extent, that you sometimes have to step back to earlier stages