Planning time fence

[Former Member]

Dear Experts,

Please provide me the clarity on planning time fence and it use.

Regards,

Phalgun Patel

[former_member186193]

Dear,

Planning time fence is the time period in which system will not disturb the current plannng situation .

The duration shown the MD61(selection screen] is the planning horizon. If you enter any date outside the planning horizon system will issue a warning message indicating the same.

Suppose that planning time fence is Ex. 25 days.From the date of MRP run, system will consider the planning time fence as 25 days onward.

Planning time fence is this time period in which system will not disturb the current plannng situation.Only manual changes are allowed.

Deciding no days in planning time fence , you have to take into consideration of normally your production cycle time.

Prerequisites

You must maintain MRP types with firming types in Customizing for long-term planning or MRP. The firming type defines how the system firms order proposals and how it schedules them.

You must enter an MRP type with a firming type in the material master record for the planning time fence to have an effect.

Hope clear to you. Please revert back.

Regards,

Alok Tiwari

[Former Member]

Hi,

The planning time fence is a time period in number of days where the system will not automatically reschedule planned orders but raise an exception message.

The MRP Type controls whether or not a planning time fence is used. You need to make sure that the MRP Type has a firming type. Once this is done, within the material you can define the planning time fence. This is in the MRP 1 view. Planning time fences can be controlled via the material or the MRP Group. The number of days you enter here is what will appear on MD04. All procurement proposal types are firm within the planning time fence. You can also determine if new order proposals should

be created outside of the planning time fence.

Check out the documentation on "Planning Time Fence" in the SAP Library.

Regards / US

[Former Member]

Hi Phalgun - here is a detailed explanation of planning time fence from SAP library. Hope this helps.

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Use

You can protect the master plan from any automatic changes to master schedule items in the near future by using a planning time fence. During the planning run, the system makes no automatic changes to order proposals within the planning time fence (which is specifically determined for every master schedule item). The system always dynamically calculates the end date of the planning time fence starting from the planning date.

Integration

You can use the planning time fence for materials planned in MRP, for master schedule items in master production scheduling and also for materials in long-term planning.

Prerequisites

You must maintain MRP types with firming types in Customizing for long-term planning or MRP. The firming type defines how the system firms order proposals and how it schedules them.

You must enter an MRP type with a firming type in the material master record for the planning time fence to have an effect.

Features

The system firms all planned orders that lie within the planning time fence. This means, the planning run can no longer make changes to firm planned orders in the long-term planning run.

Outside the planning time fence, the system creates order proposals based on the shortage quantity and the lot-sizing procedure as usual. When these planned orders move into the planning time fence, they are firmed automatically depending on the setting of the firming type.

You can define the planning time fence either individually per material in the material master record or via the MRP group.

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Regards,

Pradeep.

[madlercm]

Planning time fence is a concept that is used to prevent from MRP to create new proposals in the short/operative stabilized horizon.

The idea is that, since MRP runs without capacity planning, the planner is doing capacity planning for all the planned orders/production orders for the planning period, let's say a week or a month. Then this plan should not be subject to any automatic change or addition by the system, therefore new planned orders that lay within the time fence will be moved to after it.