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  •     QAD Glossary

  • Maintaining Holiday and Shop Calendars
    The shop calendar is required for planning, manufacturing, and distribution modules. The calendar indicates what days the plant is open and how many hours are worked each day. This information is used:
    To schedule start and due dates for MRP planned orders, master schedule orders, and work orders
    To schedule operations for work orders and repetitive schedules
    To schedule the procurement or shipment of materials through association with suppliers and customers
    Use Calendar Maintenance (36.2.5) and Holiday Maintenance (36.2.1) to maintain the calendars.
    Calendar Maintenance
    Use Calendar Maintenance (36.2.5) to specify normal work days and normal work hours for each site and its work centers. You create shop calendars for manufacturing using Calendar Maintenance, but you use Customer Calendar Maintenance (7.3.1) to create customer calendars. At least one calendar must exist.
    You can create unique shop calendars by specifying some fields while leaving others blank. A default shop calendar has a blank site, work center, and machine. The system searches for a shop calendar in the following order:
    For the specific site, work center, and machine combination
    For site and work center with a blank machine
    For site with both work center and machine blank
    If shift patterns vary because of overtime, increased or reduced shifts, or plant shutdowns, enter exception hours. Set up exceptions for a date range by specifying the number of hours that are added to or subtracted from normal work hours.

    Calendar Maintenance (36.2.5)
    In a calendar, work days are marked with a Yes and nonwork days with a No. Manufacturing order due dates are scheduled only on work days. Each work day has a production capacity in hours. This should exclude breaks and nonproductive time. Manufacturing operations can be scheduled only up to the production capacity of the day.
    Shop calendars are typically defined in this order:
    Create a system calendar by leaving site and work center blank.
    Create a calendar for each site with blank work centers. CRP uses this calendar to calculate capacity, including holidays.
    Create work center calendars with site and work center filled in.
    The system searches for a calendar from the most specific to the least specific—specific site, work center, and machine combination first and blank site, work center, and machine last.
    You can specify exceptions, such as overtime or machine downtime for preventive maintenance. The system uses exception information only when preparing operation schedules, but not when calculating manufacturing order due dates.
    Example: On July 14, two hours of overtime are scheduled at site 10000. Enter OVERTIME as the reference code, July 14 as both start and end dates, and +2 as Daily Hours.
    If an exception occurs on a day that is not part of the standard work week, add that exception to an existing day rather than changing the standard work week. Many scheduling programs assume that the work week has a certain number of days. Adding a day to the standard work week can result in inaccurate schedules.