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News: CBSE’s new digital On-Screen Marking (OSM) system for Class 12 examinations faced criticism over blurred scans, missing pages, and portal glitches.
About On-Screen Marking (OSM) System

- On-Screen Marking (OSM) is a digital evaluation system in which teachers assess scanned copies of answer books on a computer instead of checking physical scripts.
- Objective: CBSE introduced OSM to make evaluation more uniform, efficient, and secure by reducing regional variations in marking, eliminating clerical totaling errors, and improving monitoring of evaluators.
- OSM Process:
- Answer Book Collection and Coding: All answer books are marked with a secret code and moved from examination centres to regional offices.
- Scanning and Uploading: The answer books are scanned and uploaded onto a secure digital portal for evaluation.
- Anonymisation: Student roll numbers and barcode identifiers are digitally masked before evaluators access the answer books.
- Digital Evaluation:Teachers evaluate answers directly on computer screens according to a predefined marking scheme.
- Automated Tabulation: The system calculates the total marks automatically, eliminating manual addition errors.



