START is a Reliability Information Analysis Center current awareness periodical. Each START document provides a 'jump-start' on a topic of immediate interest to individuals in the reliability, maintainability, quality, supportability, or interoperability fields. In addition to a concise write-up, each installment includes comprehensive lists of contacts, bibliographic references, and other sources for further information and action.
RelTIQUES are a Reliability Information Analysis Center technology publication that goes into more detail on specific topics than our regular START sheets. Each RelTIQUE will include more detailed technical topics of interest to reliability, maintainability, quality, supportability, or interoperability students and practitioners.
RIAC START Sheets by Category
When samples are taken all at one time, it is called single sampling. The
problem of calculating the sample size for deriving a general CI has been
discussed in Reference 2. Samples for acceptance testing were presented
in Reference 3. Censored samples have been discussed in Reference 4. All
of these cases, however, only treat the situation where fixed samples of
pre-determined sizes are taken, all at one time.
An alternative consists in taking the samples in multiple stages and assessing
their results at each stage. This allows the possibility of stopping the
process and reaching an early decision, if certain conditions are met. For
example, if the start data are clear-cut in favor of (or against) the hypothesis,
then curtailing the test can save significant time and resources. Such
is the case where samples are taken in successive stages, according to the
assessment of results obtained from the previous sampling stages. This is
known as “multiple sampling”.
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