K. Tang and J. Tang (1994, Design of screening procedures: a review. Journal of Quality Technology 26(3) p. 209-226.) list some useful rules about when to inspect during manufacturing.
1. Inspect after procedures likely to produce nonconforming items.
Rasch: After applying a scoring key, check for misfit and negative point-biserial correlations.
2. Inspect before costly procedures.
Rasch: Inspect before analyzing an enormous sample. Inspect output on screen before printing on paper.
3. Inspect before procedures where nonconforming items may jam
Rasch: Misinterpretation of incorrect results "jams" the mind, vitiating analysis of correct results.
4. Inspect before procedures that cover up nonconforming items.
Rasch: Scan maps and numerical details before counting on summary statistics.
5. Inspect before assembly procedures where rework is costly.
Rasch: Inspect before using Rasch measures for statistical analysis or substantive decisions. Errant pass-fail decisions are hard to reverse.
When to inspect. Tang K, Tang J. Rasch Measurement Transactions, 1996, 10:1 p.483
|Rasch Measurement Transactions (free, online)||Rasch Measurement research papers (free, online)||Probabilistic Models for Some Intelligence and Attainment Tests, Georg Rasch||Applying the Rasch Model 3rd. Ed., Bond & Fox||Best Test Design, Wright & Stone|
|Rating Scale Analysis, Wright & Masters||Introduction to Rasch Measurement, E. Smith & R. Smith||Introduction to Many-Facet Rasch Measurement, Thomas Eckes||Invariant Measurement: Using Rasch Models in the Social, Behavioral, and Health Sciences, George Engelhard, Jr.||Statistical Analyses for Language Testers, Rita Green|
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