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Requirements date for VSF -- why not on first of month?

Posted on Nov 21, 2011 at 04:30 PM 253 Views

Please help me understand this peculiar system behavior.

MD04 routinely displays the plant/materialu2019s planned independent requirement as a u201CVSFu201D having a requirements date of the first work-day of the period.

What I cannot explain is why the October 2012 VSF has a requirements date of September 21, 2012. Why would the date not be October 1, 2012? The factory calendar assigned to the plant has October 1, 2012 as a work-day.

Same situation for December 2012. The VSF for December has a requirements date of November 21, 2012.

For the rest of 2012, and for the first three months of 2013, the VSF elements are dated on the first work-day of the month. What would cause the requirements to fall a week and a half early for October and December 2012?

By the way, I am not very fluent in MRP, so please do not assume that I have ruled out something obvious.

Regards,

zKen

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    author's profile photo Former Member
    Former Member
    Posted on Nov 21, 2011 at 05:56 PM
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    Hi Ken,

    Well as i gone through with your queiry: The thing is i have some questions for you those are:

    1) In MRP 2 view of your material how much In-house production time + GR processing time you maintained?

    2) what is your strategy or MRP group used?

    3) Have you create any sales order before or after the Independent requirement and run the MRP run?

    Regards,

    Madhu.G

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    • Former Member
      Nov 21, 2011 at 06:42 PM

      Thanks for your reply, Madhu.

      1) The goods-receipt processing time is one day. It is an externally procured item, so the in-house production time is zero.

      2) The strategy group is 40 u2013 Planning with final assembly.

      3) There are no sales orders currently in the system which are relevant for delivery in or after October, 2012. None show requirements in MD04. In our consumer products business, orders are generally booked for delivery in the u201Ctoday plus six monthsu201D time frame.

      I should add that this peculiarity is not limited to one material. It happens over many materials and across all plants. The common thread among the materials is that we plan them into info structure S608 and then disaggregate among the active warehouses / shipping points.

  • author's profile photo Former Member
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    Posted on Nov 22, 2011 at 01:11 PM
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    Well, we figured it out. The problem was the fiscal year variant.

    A few years ago, we were a nine-to-five, Monday-thru Friday kind of company. As such, the accounting periods were carefully managed so that a period never ended over a weekend or on a holiday. Nowadays, we are a 24-7 operation, and accounting periods correspond to calendar months.

    But when we changed over the fiscal year variant, it was only set up thru 2011. 2012 still had the old period strategy.

    On the MRP3 tab of the material master record, material/plants are assigned the period indicator u201CPu201D, Period according to fiscal year variant. We forecast by periods in S608.

    MRP was just doing its thing and determining requirements according to our accounting periods and setting the requirements date accordingly.

    Solution: correct the fiscal year variant out for a few more years. Transport, reload the forecast data, transfer to demand management, and run MRP.

    All is well in the stock/requirements list.

    Edited by: zKen on Nov 22, 2011 3:27 PM

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