경위서가 · 경위서를
written account of an incident, incident report
Example
사고가 난 뒤 담당자는 경위서를 제출해야 합니다.
After an accident, the person in charge must submit an incident report.
Word parts
경 warp+위 weft+서 document
경위 means 'warp and weft' of cloth, hence 'the full details of how it happened'.
Good to know
A 경위서 explains what happened; a 시말서 also admits fault and is closer to a formal apology.