General Reliability Assessment via the Physics-Based

Summary: Item parameters for several hundreds of items were estimated based on empirical data from several thousands of subjects. The logistic one-parameter (1PL) and two-parameter (2PL) model estimates were evaluated. However, model fit showed that only a subset of items complied sufficiently, so that the remaining ones were assembled in well-fitting item banks. In several simulation studies 5000 simulated responses were generated in accordance with a computerized adaptive test procedure along with person parameters. A general reliability of .80 or a standard error of measurement of .44 was used as a stopping rule to end CAT testing. We also recorded how often each item was used by all simulees. Person-parameter estimates based on CAT correlated higher than .90 with true values simulated. For all 1PL fitting item banks most simulees used more than 20 items but less than 30 items to reach the pre-set level of measurement error. However, testing based on item banks that complied to the 2PL revealed that, on average, only 10 items were sufficient to end testing at the same measurement error level. Both clearly demonstrate the precision and economy of computerized adaptive testing. Empirical evaluations from everyday uses will show whether these trends will hold up in practice. If so, CAT will become possible and reasonable with some 150 well-calibrated 2PL items.

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Two Control Areas Reliability Assessment Method based on the State Enumeration Method Considering Mass Penetration of Intermittent Generation

IEEJ Transactions on Power and Energy ◽

10.1541/ieejpes.134.328 ◽

2014 ◽

Vol 134 (4) ◽

pp. 328-335

Author(s):

Yusuke Manabe ◽

Ryoichi Hara ◽

Hiroyuki Kita ◽

Eiichi Tanaka

Keyword(s):

Reliability Assessment ◽

Assessment Method ◽

The State ◽

State Enumeration

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A comparison between single-reliability and reliability-differentiated supply system from the viewpoint of bus-based reliability assessment

IEEJ Transactions on Power and Energy ◽

10.1541/ieejpes1990.119.12_1554 ◽

1999 ◽

Vol 119 (12) ◽

pp. 1554-1555

Author(s):

Hideharu Sugihara ◽

Hiroyuki Kita ◽

Jun Hasegawa ◽

Ken-ichi Nishiya

Keyword(s):

Reliability Assessment ◽

Supply System

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Analyzing the accuracy of bank reliability assessment based on official reporting

Finance and Credit ◽

10.24891/fc.26.2.327 ◽

2020 ◽

Vol 26 (2) ◽

pp. 327-348

Author(s):

O.I. Razumova

Keyword(s):

Financial Reporting ◽

Financial Stability ◽

Systems Approach ◽

Reliability Assessment ◽

Financial Statements ◽

Rating Agencies ◽

Short Term Forecasting ◽

One Year ◽

Key Indicators ◽

Correct Forecast

Subject. The article considers ratings of banks' reliability. Objectives. The aim is to evaluate the accuracy of existing methodology for bank reliability assessment based on official reporting, to identify patterns between indicators and factors that can affect the financial sustainability of a bank. Methods. The study draws on the comparative analysis of key indicators of bank's financial statements one year prior to the introduction of provisional administration, and evaluates the results of existing methods for analyzing the financial standing of banks. Results. The findings show that those methods that use only official reporting to assess the reliability of banks are not sufficient for short-term forecasting of financial stability. Ratings of the majority of agencies that rest on official reporting have a high percentage of erroneous results, therefore, rating agencies are not able to predict the regulator's decisions regarding a credit institution. Conclusions. Currently, there are no universal methods to determine reliability, which would provide a correct forecast of deteriorated financial position of the bank. It is important to use a systems approach, where financial reporting is not a key component.

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