You can spot software bugs by accident or through pre-planned activities. There are several techniques you can try to spot one, such as:
Static Technique. It is a kind of testing without executing a program or system, like code review.
Dynamic Technique. Yet another testing wherein you execute system components to determine faults.
Operational Technique. It is an operational system that produces a deliverable containing a bug found by users.
The default life cycle handles your project deployment. And the clean bug life cycle takes the cleaning. Meanwhile, the site life cycle is for the project documentation.