"There is a standard deviation": the fall at the Northern Command base - a statistical error of the Iron Dome - voila! news. 90% of Iron Dome's interception attempts are successful.
One-tenth of missed interceptions are due to technical malfunctions: an electrical signal is delayed by a thousandth of a second, or a statistical malfunction in the computer's mathematical calculations. "Nothing provides 100% protection, therefore air defense systems are a complement to passive defense and not a substitute for it"