In light of modern software engineering practises, please explain your understanding of the phrase "software crisis" and provide three potential human sources of this issue. Explain each rationale with an example from your own experience working in software development.

The general application of software engineering principles such as process and dependability, management of requirements, and reuse begs the question: why is this the case?

Is it true that there is a lack of adherence to fundamental principles in software engineering? Explain?

Explain your understanding of the phrase "Software Crisis" in light of current software development practices, and name three human aspects that have contributed to the software crisis. Please provide supporting evidence in the form of a concrete case study involving actual software development.

Could you please provide more context or information about the waterfall methodology for software development? Barry Boehm's personal narrative and his perspectives on spiral models offer ample intrigue to warrant additional scholarly inquiry.

Give three human causes for the problem, as well as your understanding of the term "software crisis" in relation to contemporary software engineering techniques. Give a concrete example from a software development scenario in the real world for each justification.