Bathtub Curve

Reliability bathtub curve review as described in more detail in part one the bathtub curve displayed in figure 1 below does not depict the failure rate of a single item.

Bathtub curve. It describes a particular form of the hazard function which comprises three parts. The first downward portion of the curve is called an infant mortality phase and shows how a number of units would quickly fail due to defects or other issues. Bathtub curve profiles the failure rate of a large sample of components or a large sample of systems as they age. This bathtub also features a built in reinforced bathtub support to enhance installation and performance.

A bathtub curve is a visual representation of the failure rate of a product or group of products over time. The resulting curve describes not only the behavior of engineering components but also the lifetimes of human populations. The classic 400 curve 5 ft. The bathtub curve is a type of model demonstrating the likely failure rates of technologies and products.

The bathtub curve consists of three periods. Actual product dimensions 59 88 in. Delta laurel 59 875 in w x 32 in l high gloss white acrylic oval in rectangle left hand drain alcove bathtub. Bathtub curve a plot of the failure rate over time for most products yields a curve that looks like a drawing of a bathtub if enough units from a given population are observed operating and failing over time it is relatively easy to compute week by week or month by month estimates of the failure rate h t.

Sterling medley 30 25 in w x 60 in l white vikrell rectangular left hand drain alcove bathtub. W x 29 94 in. The bathtub curve is widely used in reliability engineering. Instead the curve describes the relative failure rate of an entire population of products over time.

D x 18 in. An infant mortality period with a decreasing failure rate followed by a normal life period also known as useful life with a low relatively constant failure rate and concluding with a wear out period that exhibits an increasing failure rate. By plotting the occurrences of failure over time a bathtub curve maps out three periods that an asset experiences within its lifetime. 15 11 is perhaps the most famous graphical representation in the field of reliability.

The first part is a decreasing failure rate known as early failures. The bathtub curve named for its shape and shown in fig. Plotted is the failure rate h t versus time. Over a certain product lifetime the bathtub curve shows how many units might fail during any given phase of a three part timeline.

The second part is a constant failure rate known as random failures. Sterling performa 29 in w x 60 in l white vikrell rectangular right hand drain alcove bathtub.