Many of Cambridge Assessment's written examination scripts are now scanned and marked on screen by examiners working on computers. One benefit arising from on-screen marking is that the marks are captured at item or question-part level and are available for analysis in Cambridge within hours of being submitted by examiners. Cambridge Assessment now routinely analyses these item marks and provides subject staff and senior examiners with reports containing Item Level Data (ILD) for nearly all examinations marked on screen. In this article, we present findings from an evaluation of senior CIE and OCR examiners' use of these Item Level Data reports.