So well known that it's just openly published: https://www.cia.gov/static/5c875f3ec660e092cf893f60b4a288df/SimpleSabotage.pdf https://www.cia.gov/static/5c875f

So well known that it's just openly published: https://www.cia.gov/static/5c875f3ec660e092cf893f60b4a288df/SimpleSabotage.pdf https://www.cia.gov/static/5c875f3ec660e092cf893f60b4a288df/... e.g.: > In tempering steel or iron, apply too much heat, so that the resulting bars and ingots are of poor quality. > Mix good parts with unusable scrap and rejected parts. > Misfile essential documents.