Daily Sched Lines then weekly purchase reqs

[Former Member]

Hello All,

Using the opening period and schedule margin key we can tell the system to create schedule lines within the opening period and then purchase requisitions. The schedule lines are daily.

We would like to know how to set the purchase reqs beyond the opening period to group into weekly buckets.

Can this be done?

Thank you,

Jerry

[Former Member · Accepted solution]

Hi

you can certainly group the requisitions into weekly buckets easily enough by using the correct lot size indicator.

But I think you are asking for MORE than this. I think that you are asking if you can have a different lot size depending on how close you are to the requirement date?

this is also possible, but a lot more tricky.

For example you could have weekly buckets as a standard but if the requirement is within 4 weeks of today you could get it to automatically switch to exact lot sizes (or vice versa)

You would need to configure a new lot size key and use the settings to determine different effects depending on the different days.

Have a look at a lot size config screen and you will see two sections. the one at the top is the normal standard settings but there is also the ability to get the system to "swicth" to a different lot size X days before the requirement date (you will see the "period" field that is used to determine when to switch.

So try this out in your play client and you might find that it can do what you wanted.

Steve B

[Former Member]

Hi,

You need to define the lot size as long term/short term so that what stephen

has told can be achieved.

ie Within short term one lot size and in the long term another lotsize.

Period Lot-Sizing Procedures

Use

In period lot-sizing procedures, the system groups several requirements within a time interval together to form a lot.

Features

You can define the following periods:

days

weeks

months

periods of flexible length equal to posting periods

freely definable periods according to a planning calendar

The system can interpret the period start of the planning calendar as the availability date or as the delivery date.

Short-Term and Long-Term Lot Size

Use

If you define a short-term and a long-term lot size for a material, you can split up the time axis for the material requirements planning into a short-term and a long-term area and thus carry out the procurement quantity calculation using two different lot-sizing procedures.

You can therefore, for example, group together requirements over a larger period in the long-term area to produce a rough picture of the future master plan and select a more precise lot size to suit your requirements in the short-term area.

Prerequisites

You have defined the settings for the short-term and long-term lot size in the IMG activity Check lot-sizing procedure in Customizing for MRP.

Features

During the planning run the system calculates the time axis for the validity of both lot-sizing procedures. The procurement quantities in the first, short-term area are calculated using the short-term lot size. From the valid from date of the long-term lot size the system switches to the long-term lot size.

If no long-term lot size has been specified for a lot-sizing procedure, the system plans the complete planning period using the short-term lot size.

Calculating the Long-Term Lot Size

The start of the effectivity period of the long-term lot size is determined using the number of periods specified in Customizing. The system always rounds up to the end of a period that has already started and then sets the valid from date to the beginning of the next complete period. The system normally offers period lot sizes for the long-term lot size. This ensures, that the period requirements grouping is always traceable within the defined period length of the period lot size.

The calculation of the date from which the long-term lot size is valid is 15 March. Four months have been entered for the periods for this calculation. The system calculates four months into the future (15 July) and then rounds up to the beginning of the next complete period. The long-term lot size is thus valid from 1 August.

You can also define a period for lot-for-lot order quantity in Customizing, which is set for the short-term and the long-term period. The system then always plans using lot-for-lot order quantity in this period, even if other lot-sizing procedures have been defined in the short-term and long-term period.

Regards,

nandha