| | Purchase SchedulesA purchase schedule is a timetable of planned supply of
materials. Purchase schedules support long-term purchasing with frequent
deliveries and are usually backed by a purchase contract. All requirements for
the same item, buy-from business partner, ship-from business partner, purchase
office, and warehouse are stored in one schedule. Purchase schedules are used
instead of standard purchase orders in cases where full visibility and time
phasing of material requirement information is required. Therefore, purchase
schedules provide a more detailed way to specify the delivery dates/times per
item. The following types of purchase schedules exist: Push schedule A list of time-phased requirements, generated by a central
planning system, such as Enterprise Planning or Project that is sent to the purchase business partner. Push schedules contain both a
forecast for the longer term and actual orders for the short term. A push
schedule is a non-referenced schedule. Pull forecast schedule A list of time-phased planned requirements, generated by Enterprise Planning, that is
sent to the purchase business partner. Pull forecast schedules are only used
for forecasting purposes. To order the items, a pull call-off schedule must be
generated with the same schedule number as the pull forecast schedule. Similar
to a push schedule, a pull forecast schedule is also a non-referenced schedule. Pull call-off schedule A list of time-phased specific requirements of purchased items,
triggered from Assembly Control, Shop Floor Control, or Warehousing (KANBAN, Time-phased order point). A pull call-off schedule
is a referenced schedule.
The generation and processing of push schedules includes several steps. The generation and processing of pull forecast schedules
includes several steps. The generation and processing of pull call-off schedules
includes several steps. The following constraints can prevent Enterprise Planning to
generate or update non-referenced purchase
schedule lines: frozen zone settings, generation horizon of the patterns,
expiry date of the contract, and the Firm Planned status of the schedule
line. Configured items can be purchased via purchase
schedules, which contain the configuration information (options and features)
needed for the supplier to produce the product. A purchase release is used to send out, under one release
number, several schedules with similar characteristics. For push schedules, goods are usually received against a blanket warehouse order and the purchase release usually contains clustered
schedule lines. When goods are received, the goods are distributed over the
schedule lines with the oldest unfulfilled requirement of the type Immediate or Firm. If scheduled items must be inspected upon receipt, approved and
rejected quantities are retrieved from Warehousing. The type of
schedule, push schedule or pull call-off schedule, determines how the
inspection results are communicated to Procurement. Suppliers ship purchase schedule items based on the requirement type. The Firm requirement type, however, can deviate from the earlier received Planned requirement type. If you use authorizations,
before the Firm requirement type is communicated, a buyer gives a
supplier permission to fabricate goods or to buy raw materials up to a certain
quantity level. The essence of an authorization is that you bear the risk if
you do not need the goods. In other words, you must pay for the fabrication
and/or raw materials, whether or not the goods are actually required. Purchase schedule cumulatives (CUMs) are used to do the following: keep
track of a schedule's total ordered and received quantities, calculate
overdeliveries and underdeliveries for push schedules, and inform the supplier
on the received quantity. To identify costs, demand, and supply for a project, you can
peg project costs for purchase schedules. You can use purchase schedule history to track when purchase
schedules were created or maintained. You can keep certain information after
the original purchase schedule is removed.
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