In Software Engineering, the concept of a software failure curve is part of the hardware bathtub curve. According to the diagram, the failure rate is a function of time for Hardware. This curve shows that hardware exhibits a relatively high failure rate early in its life (these failures are often design or manufacturing defects); defects are corrected, and the failure rate drops to a steady-state level for some time.

After some time according to time passes, the failure rate rises again as hardware components suffer from multiple effects and many other environmental maladies. Stated simply, the hardware begins to wear out.

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