Final answer:
An exact number of floors for considering shutdowns as unplanned out of service conditions depends on the building's operational guidelines or regional safety codes. A single floor might be enough, or more floors might be specified in certain standards.
Step-by-step explanation:
The question relates to a scenario common in facility management or building operations, where the term 'shutdowns' likely refers to the temporary cessation of services or utilities in a building. Without a specific context or authoritative reference, it's not possible to provide an exact answer for how many floors are considered when identifying unplanned out of service conditions.
It is dependent on the policies of the building management and the regulatory standards that they follow. A single floor could trigger this condition if it affects critical operations, or a guideline might specify a fixed number of floors, such as two, three, or more.
For a more precise answer, one would need to consult the specific building's operational guidelines, regional safety codes, or industry standards that define an unplanned out of service condition. These documents would detail the threshold for the number of floors affected that requires emergency procedures or reporting.