▁to ▁their ▁cells ▁until ▁the ▁end ▁of ▁the ▁day ▁is ▁an ▁example ▁of ▁a ▁" lock down ▁period " ▁in ▁a ▁corre ctions ▁schedule . ▁However ▁a ▁" full ▁lock down " ▁is ▁used ▁when ▁all ▁prisoners ▁are ▁locked ▁in ▁their ▁cells ▁to ▁prevent ▁prison ▁ri ots ▁or ▁un rest ▁from ▁spread ing ▁or ▁during ▁an ▁emer gency . ▁ ▁H osp it als ▁In ▁US ▁gu idel ines , ▁occasions ▁for ▁prevent ing ▁entry ▁into ▁a ▁hospital ▁may ▁include : ▁power ▁failure , ▁earth qu ake , ▁flo oding , ▁fire , ▁bomb ▁threat , ▁host age ▁crisis ▁ ▁and ▁active ▁shoot er . Lock down ▁Policy ▁at ▁I ro qu ois ▁Health care ▁Alliance . ▁Retrieved ▁December ▁ 2 0 1 2 ▁Occ as ions ▁for ▁prevent ing ▁both ▁entry ▁and ▁exit ▁from ▁a ▁hospital ▁may ▁include : ▁external ▁cont am ination , ▁civil ▁disturb ance ▁and ▁ab du ction ▁of ▁an ▁infant ▁or ▁child . ▁ ▁Le an ▁manufact uring ▁process ▁In ▁manufact uring , ▁the ▁term ▁lock down ▁event ▁refers ▁to ▁a ▁continuous ▁improvement ▁initi ative ▁in ▁which ▁manufact uring ▁in ▁ ▁a ▁specific ▁area ▁( typ ically ▁a ▁cell ▁or ▁specific ▁piece ▁of ▁mach in ery ) ▁is ▁halt ed ▁in ▁order ▁to ▁contain , ▁and ▁determine , ▁what ▁are ▁the ▁issues ▁that ▁are ▁prevent ing ▁the ▁manufact ure ▁of ▁goods ▁from ▁meeting ▁the ▁quality ▁specific ations . ▁During ▁the ▁lock down ▁event '' ▁a ▁multi ▁discipl inary ▁team ▁reviews ▁the ▁specific ▁area ▁manufact uring ▁processes , ▁tool