A policy in which all exit doors for a building stay unlocked during a fire is an example of what type of policy?

A policy in which all exit doors for a building stay unlocked during a fire is an example of fail open policy.

Explanation:

It is a system to remain opens all the exit door of a building. So that if any chance any accident occurs public can rush through it and save their life. It is called open policy and the word fail is attached with it to denote the occurrence of fire. If fire take place that is the failure of management part.

And to avoid major disaster to remain open the door is the strategy. That's why it is named as fail open policy. For e.g. if in any shopping mall fire set up it will take time to reach fire brigade there. Before that to save life fail open policy should be followed.