reliability


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Related to reliability: Software reliability, Reliability testing

reliability

 [re-li″ah-bil´ĭ-te]
1. in statistics, the tendency of a system to be resistant to failure.
2. precision (def. 2).

re·li·a·bil·i·ty

(rē-lī'ă-bil'i-tē),
The degree of stability exhibited when a measurement is repeated under identical conditions. See: correlation coefficient, reliability coefficient.
[M.E. relien, fr. O.Fr. relier, fr. L. religo, to bind]

reliability

Statistics The extent to which the same test or procedure will yield the same result either over time or with different observers. See Interrater reliability, Test-retest reliability.

re·li·a·bil·i·ty

(rĕ-lī'ă-bil'i-tē)
Repeatability; ability of a test to be repeated by several testers and produce the same result.
[M.E. relien, fr. O.Fr. relier, fr. L. religo, to bind]

reliability 

The extent to which multiple measurements of the same thing, made on separate occasions, yield approximately the same results. The reliability between two sets of scores can be assessed by determining the correlation coefficient (test-retest reliability coefficient). See validity.

re·li·a·bil·i·ty

(rĕ-lī'ă-bil'i-tē)
Degree of stability exhibited when a measurement is repeated under identical conditions.
See: correlation coefficient
[M.E. relien, fr. O.Fr. relier, fr. L. religo, to bind]

Patient discussion about reliability

Q. How easy is it to tell about the baby’s birth date? Is it reliable? Hi everyone! My sister is being diagnosed as pregnant. She has a very regular menstrual cycle and her hormone levels are good. How easy is it to tell about the baby’s birth date? Is it reliable?

A. My friend got the due date of birth by doctor and it goes very near by, just the difference was for 5 days from the date. Since you have very regular menstural cycle, it would be easy for the doctors to calculate the birth date. And you can rely on the birth date being calculated by the doctors. It can be calculated easily. You need to find the 1st day of your last period then count back 3 months and add 7 days. Now you get your date.

Q. Can someone…clarify which is the best and reliable one? Hi I am 23 years woman............ I am confused with the different type of tests and diagnosis my friend is having as she is being suspected for breasts cancer. Can someone…clarify which is the best and reliable one?

A. Please understand that all the tests that are being carried out are reliable and it would entirely depend upon the requirement and treatment stages. They would also depend upon age groups , stages of cancer etc. In general the different types are: clinical breast examination done by the clinicians in a clinic. Mammogram, which are special X-ray to check abnormal growth changes in the breast tissues. Chance of cyst to be confused by breast cancer is resolved by ultrasound. To check if the particular tissue is cancerous is done by breast biopsy.

Q. What are the tests and steps involved in diagnosis of breast cancer and are all tests reliable?

A. First symptoms are looked for----- as a lump and pain associated with it and any redness or any nipple discharge. They also look for the medical history and if found for any possibility then it’s evaluated by mammography, but for woman it can give wrong result as they have dense breasts but for men it is well diagnosed. If any breast abnormalities are found during mammography they are confirmed with ultrasound and for women patients this is a better option. For women and symptom evident men for nipple discharge are also looked for nipple discharge test. But these tests do not confirm a cancer and for confirmation a biopsy is required followed by lab test on those biopsy samples. Biopsy is removing of body tissue for further cancer confirmative lab tests which is generally looking under a microscope to indentify the cell type and the type of cancer is known. Their reliability is based on the person operating the instrument and his experience.

More discussions about reliability
References in periodicals archive ?
The global asset reliability software market has been studied for different sources of revenue, deployment, and different types of industries.
CMMS Data Group, founded in 2000, is the market leader in CMMS software and services, providing time and money-saving solutions to maintenance, facilities, reliability, and inventory professionals to not only increase reliability, productivity, profitability, and customer satisfaction, but to make their jobs easier.
With a growing complexity of technical systems, reliability increase of the systems obtains growing significance.
Melchers, "A convenient approach for estimating time-dependent structural reliability in the load space," Probabilistic Engineering Mechanics, vol.
The two-terminal reliability research is followed by the development of the network.
When conducting reliability analysis for Risk Assessment and AoA, a sensitivity analysis on the reliability requirements should quantify the financial impact that various levels of system reliability will have on the program's life-cycle costs.
Intrinsic reliability testing predicts the long-term viability (Figure 1) of ICs by measuring the wear-out properties of the materials used in manufacturing.
Beginning in 2008, DOD undertook a concerted effort to raise the priority of reliability through greater use of design for reliability techniques, reliability growth testing, and formal reliability growth modeling, by both the contractors and DOD units.
[check] Based on the analysis of different researchers only limited number of factors has been addressed for verifying reliability. Some of research contributors consider only availability and execution time as important aspects of checking reliability.
Caption: FIGURE 1: Relation between reliability index [beta] and coefficient of variable [COV.sub.tol].
"Practical Engineering, Process, and Reliability Statistics" by Mark Allen Durivage was specifically written to aid quality technicians and engineers in the performance of their assignments.
Gas and Oil Reliability Engineering: Modeling and Analysis, Second Edition, provides the latest tactics and processes that can be used in oil and gas markets to improve reliability knowledge and reduce costs to stay competitive, especially while oil prices are low.

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