Complex sentence: The normal development cycle for electronic hardware contains two main phases, the first phase is the development and prototype phase in which the hardware is designed and often simulated then the design is manufactured in a low quantity as prototypes for testing.
Split into simpler sentences: The normal development cycle for electronic hardware contains two main phases. The first phase is the development and prototype phase in which the hardware is first designed and often simulated then the design is manufactured in low quantity as prototypes for testing.