Final answer:
Facility-level or organization-sustaining activities are part of Activity-Based Costing and are necessary for the general operations of a business. They are not directly tied to the production or sales volume of specific products or services.
Step-by-step explanation:
Activities that occur regardless of which customers are served, which products are produced, or how batches are run or units made are facility-level or organization-sustaining activities. These are a part of an accounting method known as Activity-Based Costing (ABC), which helps organizations identify the full cost of each product or service they provide. Facility-level activities are necessary for the overall operation of a business and are not directly tied to any particular product, service, or batch; examples include factory maintenance, administration, and security. These activities differ from those that are product-level, batch-level, or unit-level, which vary with the production or sales volume.