In IBM Maximo, the Calendars application is used to define periods of availability, such as work shifts, holidays, and non-work periods, which is critical for scheduling. Calendars can be directly associated with records that have operational schedules or require resource planning. The primary record types that utilize calendars for managing availability are Assets (for defining maintenance windows), Locations (for defining access times), and Person records (for defining labor shifts and vacations). These associations are fundamental to the functionality of modules like Preventive Maintenance and Work Order Tracking for effective resource and work scheduling.

A. Items: Items are inventory records for materials and services; they do not have operational schedules that would require an associated calendar.

C. Job Plan: A job plan is a template for work, not a schedulable entity; calendars are applied to the resources on the resulting work order.

E. Contracts: Contracts define commercial terms, conditions, and payment schedules, not the operational availability of physical resources or personnel.

1. IBM Maximo Application Suite Documentation. "Calendars application." IBM. Accessed 2023. In the overview of the Calendars application, the documentation explicitly states, "You can associate calendars with records for labor, assets, locations, and other types of records to extend the capabilities of other applications." This directly confirms that Assets, Locations, and Person (Labor) are the intended record types.

Source: IBM Documentation, Maximo Manage 8.11, Administering Maximo Manage > Planning and scheduling resources > Calendars application. (URL: https://www.ibm.com/docs/en/mas-manage/8.11?topic=resources-calendars-application)