Re: JBA ML - MRP and DRP

Hi Stuart

We also use MRP/DRP in similar situation to you and have not seen this
problem in over 12 months of using this scenario. We use MRP set for single
site only (our main production site which is also central SR for DRP
network). DRP is set up to allow a number of items at remote SR to be
locally purchased but the majority of items are centrally sourced form the
production site. As MRP only runs on the single site we have no problems.

In our setup your scenario would be as follows:

1. A sales order generated in SR 01 would generate a requirement for 30
widgets.
2. Next DRP run would see this requirement and create a distribution order
to transfer 30 widgets from 10 to 01
3. The order would allocate the available 15 widgets and leave a
requirement for 15.
4. Next MRP run would see the outstanding requirement in SR 01of the DRP
order for the 15 widgets and add to that any other requirements and also a
safety stock replenishment if that is set.

If you did in fact have safety stock of 15 and no other requirements then
MRP should tell you to order 30.

My guess, which you might confirm, is that you have MRP set to run on
multiple sites. If that is true then GEAC are correct and there is no
interaction between MRP and DRP to mutually exclude their respective
efforts to satisfy the requirement.

I have never tested MRP/DRP where MRP is set for multi site but I really
would have thought that MRP would have still recognised that the
requirement at SR 01 is already satidfied by an incoming distribution order
(the same way that DRP sees the order as a 'supply').

Could I suggest that possibly a process change may be the answer. If you
were to do your DRP network run BEFORE your MRP run it would be interesting
to note if any DRP orders were recognised by MRP as 'supply'. If you were
to pick one item with demand before both runs you would be able to analyse
this by looking over DRP72/73 for Distribution and MSP72/73 for MRP and see
exactly what these routines are picking up.

Good Luck!

BR

Rick Allen






                                          To:    "'jbausers-l@midrange.com'" 
<jbausers-l@midrange.com>
                                          cc:
          Stuart Sandler                  Subject:                              
       JBA ML - MRP and DRP
          <SSandler@KREBS.COM>



          Sent by:
          jbausers-l-admin@midrange.com


          05/12/01 07:52
          Please respond to jbausers-l






We are using both MRP and DRP and have discovered a problem that I wondered
if anyone else had encountered.

We use DRP only to transfer goods from stockroom to stockroom (for example
from our stockroom in Tucson to one in Canada). In the past, we used sales
orders with no selling price, but had to do monthly journal entries to
reverse the costs. When we upgraded to System 21, we purchased DRP to
eliminate this.

Now, we have found out that System 21 MRP does not see 'DRP' orders as
supply, but rather as demand. In other words, if we have a requirement for
30 widgets, and happen to have 15 in stockroom 10 and then create a DRP
order to transfer them to stockroom 01, MRP thinks that we have a demand
for
45 and tells us to order that many, instead of seeing the 15 in stockroom
10
as a potential supply.

I turned this problem into the GEAC help desk, thinking we had simply set
up
something incorrectly, but they confirm that DRP and MRP will not work
together in this type of example.

If any of you have any suggestions, or if you have encountered this and
have
an idea, I would appreciate hearing from you.

Thanks in advance.

Stuart Sandler
Director of Information Systems
Krebs Engineers
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