Reliablity Planning Flashcards
An ideal reliability test programm discovers, ..
Discovers every failure mode (VI - 2/3)
For continual improvement in product reliability which of the following tests is most desirable?
Development tests. (VI - 7/8)
In specially designed test environments, devices can be analyced against more than one environmental condition. This type of reliability testing is known as:
Combined environmental reliability testing (VI - 29/30)
A majority of product quality problems is said to be the result of:
Design (VI - 20)
There are various categroies of reliability testing. A test of device to verify that it is acceptable for its intended function would be classified as:
Qualification test (VI - 6/7)
In product liability, the proper legal term for statements regarding the reliability of a product are known as:
Representation (IV - 27/28)
An excellent reference for establishing a reliability test program would be found in:
MIL-HDBK-781 (VI - 29)
A reliability engineer can recommend that various tests be performed on a new part. Which of the following would be a direct result of those tests?
Knowledge of whether the part meets requirements (VI 2/3)
The legal department would like the team`s expertise in minimizing warranty problems. The best first course of action would be to:
Review the existing warranty data collection process for imporvements
According to ISO 9000 which step tests the product to ensure it meets its intended use?
Validation (VI - 21)
If one were to review a reliability development program, whose alpha in the duane model is reported to be 0.7 they would conclude:
The Duane Model is being used improperly (VI - 13/17)
Under which of the following legal descriptions can your company`s records be obtained?
Discovery (VI - 27/28)
When human factors in reliability are considered, what is the fundamental concept?
The method a human uses the device may affect the reliability
The initial qualification test for a part generated 5 failures in 3000 hours. The goal is for a MTBF of at least 2000 hours in service. If the alpha value is 0.4 how much total testing is required?
Duan Model Calculation is required (VI - 14/15 ; 17000 hours )
Consideration of combined environmental reliability testing should inlcude which of the following factors:
Vibration testing (VI -29/31)
One strategy for dealing with product liability is:
Selecting a product liability insurance policy (VI - 24 and 26)
For continual improvement in product reliability which of the following tests is most desirable?
Development tests (VI - 7/8 and 14/15)
According to ISO 9000 which step tests the product to ensure it meets its intended use?
Validation (VI - 21)
TAAF is best performed at which stage of the product life-cycle
Desing/Development (VI - 13)
A reliability test of 20 components was run with the test plan to stop the test when 10 failures were observed. The MTTF determined is determined by:
The total accumulated time divided by 10, but with confidence intervals calculated (VI - 29/31)
When designing mechanical parts, in order to decrease risk of failure to overloading conditions:
Radii at connecting parts should be as large as possible (VI - 27)
One of the uses of the Duane model is to:
Predict the expected growth of MTBF (VI - 13/17)
For continual improvement in product reliability which of the following tests is most desirable?
Development Test
A reliability test of 20 components was run with the test plan to stop the test when 10 failures were observed. The MTTF determined is determined by:
The total accumulated time divided by 10, but with confidence intervals calculated.
One of the main reasons for conducting reliability testing is:
To monitor reliability growth over time
When performing an acceptance test on one shot devices, which test method can provide reliability information at given level of confidence?
Failure free testing
Products should be subjected to tests which are designed to:
Approximate the conditions to be experienced in customer`s application
A mature design is one that has been evaluated and verified to meet requirements. What is the most effective method to obtain reliability growth and design maturity?
Via a structured test, analyze and fix program
Which of the following test conditions is normally a direct, instead of a combined environmental reliability testing technique?
Hardness Cycling
=> Stress, temperature and vibration cycling test data is routinely collected in a combined environmental testing. Hardness is normally a direct measurement.
For continual improvement in product reliability which of the following tests is most desirable?
Development tests.
=> Development tests, like reliability growth testing and test, analyze and fix testing, will continually improve reliability.
There are a variety of reasons for reliability testing. Among them are to induce failure modes, to determine if reliability requirements have been met or to determine safety margins. The responsibility for reliability testing is placed on:
Supplier and customers jointly
Failure modes, can vary dramatically due to …
changes in use applications
In the classification of defectives, such as DOD-STD-2101,
if an item will produce a significant degradation in performance, the classification would be …
Major
