S/N

Shapes

Applications

Aging Factor

1.

Constant (Random) Failure Rate

・ Applied to entities who have the propensity to fail randomly or by chance

・ unpredictable failures

・ Third-party damage

・ Material defects

・ Random

2.

Increasing failure Rate

・ In most situations this is the hazard we experience

・ Machinery, organism,

・ Consumer products

・ Corrosion

・ Fatigue

・ Time dependent

3.

Decreasing failure Rate

・ Not very common

・ New typist employed in a company

・ Time dependent

4.

Bathtub-shape failure rate

・ Patients who undergo surgery

・ infant mortality

・ Time dependent