time fence
C2CEFR level
92/100Rarity: very rare
TechnicalRegister
A boundary in the planning horizon inside which schedule changes are restricted or frozen.
That change order landed inside the time fence, so it can't touch this week's build.
Rarity runs from 0 (a word everyone knows) to 100 (almost never seen outside specialist or literary writing). Level is the word's real difficulty on the CEFR scale, from A1 to C2.
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