Your company SOP are mirror like my Airbus FCOM 4.3.12, which says :
- Before reching 80 knots :
- TAKE OFF EPR.....................................CHK
Check that the actual EPR of the individual engines has reached the EPR rating limit, before raching 80 knots. Check EGT.
No reference to any other powerplant parameter(s).
if one engine is, say, 0.5% below the N1 limit, is that a stop call???
I consider yes.
If engine(s) do not reach TO thrust within 80Kts in all likelihood the risk not to meet all performance requirements is high. So, better to RTO before reaching 100Kts or above, when a RTO becomes "a much more serious matter".