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Former Member


In MRP Run screen,There is a line called "Create purchase req"

there are 3 options

1 Purchase Requisitions

2 Purchase requisitions in <b>opening period</b>

3 Planned Orders

What is that opening period?

When i should go for 2nd option?

What is the necessary of creating a planned order rather than a purchase requisition?

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    Former Member
    Aug 16, 2007 at 09:00 AM

    Hi Vijai

    If you choose 1 , that means it will create always PR for total planning

    If you choose 2 , it will create PR for Opening period which you have mentioned in scedule margin key and more then openning period it will planned order , MRP controller will have hold or when it reqs he will convert to PR

    If it is 3 , It will be awlays Planned order and MRP controller will decide to convert PR or not



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    Former Member
    Aug 16, 2007 at 09:01 AM

    Hi vijai prasad shanmugam ,

    Product-specific time period during which a planned order or a purchase requisition should be converted into a manufacturing order or a purchase order is known as opening period. It is connected with the values maintained in the schedule margin key & assigned to the material......The opening period is defined in workdays.

    As per my understanding Planned order -> Manufacturing order , so we need the BOM & routing for the in-house production of the material....... in case the routing is not maintained then the system creates one default operation & assign all the materials to it............

    Please reward points if helpful........

    Thanks & Regards


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  • Aug 16, 2007 at 09:11 AM

    Dear Mr.Vijay,

    In Customizing settings,SPRO - Production - Material Requirement Planning -

    Planning - Scheduling and Capacity Parameters - Define Floats - Opening period.

    Also check the help content given by SAP,

    <b>Define Floats (Scheduling Margin Key)</b>

    In this step, you specify the floats for determining the basic dates of the planned orders. The floats are allocated to the material via the release period key in the material master record.


    Opening period</b>

    The opening period represents the number of workdays that are subtracted from the order start date in order to determine the order creation date. This time is used by the MRP controller as a float for converting planned orders into purchase requisitions or into production orders.


    The opening period should reflect the processing time the MRP controller needs to convert planned orders into purchase requisitions or production orders. The opening period should be at least as long as the interval between two MRP intervals, so that all planned orders can be taken into account during the conversion.



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    Former Member
    Aug 16, 2007 at 09:24 AM


    1) You may require some time to convert the planned order into production order or purchase requisition. This time is the opening period. This is the time gap between order creation and order start.

    2) Second option is not used generally. Imagine a situation that your MRP 2 view contains procurement type = F (external proc), after MRP, the system should create a Purchase requisition but if the actual requirement date of the component is way long in future i.e. you have a very huge time available with you for procuring this component, the system will create a Pld order with key = 2. In normal situation it will create PR. (The time gap I mentioned is the planning horizon)

    3)Planned orders are created for inhouse manufacture (MRP 2, Proc Type-E). Purchase requisitions are created for Ext Proc (F). Some times planned orders are created for external procurement too. Here the MRP controller has a better control on the materials. He converts these planned orders into PRs.


    Mahesh Patil.

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