ced ures ▁for ▁using ▁both ▁emer gency ▁and ▁prevent ive ▁lock down s ▁must ▁be ▁planned . ▁ ▁Pre vent ive ▁lock down ▁ ▁A ▁prevent ive ▁lock down ▁is ▁a ▁pre empt ive ▁action ▁plan ▁implemented ▁to ▁address ▁an ▁unusual ▁scenario ▁or ▁a ▁weak ness ▁in ▁system ▁to ▁pre empt ▁any ▁danger ▁to ▁ensure ▁the ▁safety ▁and ▁security ▁of ▁people , ▁organisation ▁and ▁system . ▁The ▁focus ▁for ▁prevent ive ▁actions ▁is ▁to ▁avoid ▁d angers ▁and ▁ris ks ▁ar ising ▁from ▁the ▁non con form ances ▁to ▁the ▁normal ▁circumstances , ▁but ▁also ▁commonly ▁includes ▁improvements ▁in ▁efficiency . ▁ ▁Pre vent ive ▁lock down s ▁are ▁pre empt ive ▁lock down s ▁to ▁mit ig ate ▁risk . ▁Most ▁organis ations ▁plan ▁for ▁the ▁emer gency ▁lock down s ▁but ▁fail ▁to ▁plan ▁for ▁other ▁situations ▁which ▁might ▁quickly ▁deg rade ▁to ▁dangerous ▁levels . ▁These ▁protocol s ▁must ▁be ▁based ▁on ▁the ▁type ▁of ▁threat , ▁and ▁should ▁be ▁kept ▁simple ▁and ▁short ▁for ▁quick ▁learning ▁and ▁implementation , ▁and ▁flexible ▁enough ▁to ▁handle ▁several ▁scenarios . ▁This ▁allows ▁administr ators ▁more ▁options ▁to ▁choose ▁from ▁which ▁are ▁easier ▁to ▁use ▁in ▁various ▁scenarios . ▁For ▁example , ▁in ▁case ▁of ▁a ▁loud ▁scene ▁by ▁a ▁parent ▁or ▁an ▁un ar med ▁pet ty ▁th ief ▁being ▁ch ased ▁by ▁the ▁police ▁through ▁the ▁school ▁play ground , ▁this ▁flexible ▁procedure ▁allows ▁school ▁administr ators ▁the ▁flex ibility ▁to ▁implement ▁a ▁more ▁limited ▁lock down ▁while ▁teaching ▁in ▁school