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Specification of scheduling criteria for missions can be simplified by using calendars. A calendar is a defined schedule (for example, every day except Saturdays and Sundays of each month) that can be applied to missions.
Calendars are defined in the IOA Calendar facility. Each calendar is given a unique name that can be specified in mission definitions. A particular calendar (meaning, a unique set of dates) only needs to be defined once.
Specifying the name of a calendar in a mission definition enables that mission to be scheduled on the dates specified in that calendar.
Two types of calendars can be defined: Regular and periodic.
Regular calendars consist of scheduling dates or days (of the week) that can be defined according to monthly patterns.
Calendar Examples
Table 19 Regular Calendar Examples
WEEKDAYS |
Schedules rules each Monday through Friday in each month. |
WEEKENDS |
Schedules rules each Saturday and Sunday in each month. |
QUARTERLY |
Schedules rules on the last day of each quarter: March 31, June 30, Sept. 30, Dec. 31. |
Regular calendars are especially useful when many missions have the same schedule. Defining that schedule once in a calendar, and specifying the name of that calendar in the mission definition of those missions, makes it unnecessary to individually define that schedule in the mission definition of those missions.
Periodic calendars are especially useful when scheduling dates do not conform to fixed date/day of the week/month patterns.
Example
PAYCAL – Schedules missions (for example, payroll) every other Wednesday. Scheduling occurs on the first, third, and (if there is one) fifth Wednesday of some months. Scheduling occurs on the second and fourth Wednesday of other months.
The IOA Calendar facility is described in further detail in IOA Calendar Facility.
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