Hi Nagarajan,
Thanks for the reply.
I know that there can be a link estabilished between Prod.Or and Sales Or. the way you mentioned. The real problem is that in - standard - B1 you don't have any connection between Production orders, and neither between Production orders and purchase orders.
What I was trying to say, that this causes difficulties when the due date of a production order or purchase order relating to a lower lever of a product tree changes, and you need to follow these changes.
Example:
I add a sales order for item A0001 with the due date of 2015/07/31, lets say for 5 pcs of it.
Qty is not relevant in this example, I'm just trying to show the problem.
A0001 is a "Make" item with following BOM (It's a multilevel item, containing other "Make" items):
A0001 (Make, Lead time: 1 day)
---B0001 (Buy, Lead time: 1 day)
---C0001 (Make, Lead time: 2 days)
----D0001 (Buy, Lead time: 3 days)
----E0001 (Make, Lead time: 2 days)
---F0001 (Buy, Lead time: 1 day)
---G0001 (Buy, Lead time: 4 days)
Let's say none of the above items have stock, so everything is 0. I run MRP on the sales order of A0001, I get recommendations (counting with the lead times), which I add. To be more specific:
- A0001 - Production order, due date: 2015/07/31
- B0001 - Purchase order, due date: 2015/07/30
- C0001 - Production order, due date: 2015/07/29
- D0001 - Purchase order, due date: 2015/07/26
- E0001 - Production order, due date: 2015/07/27
- F0001 - Purchase order, due date: 2015/07/26
- G0001 - Purchase order, due date: 2015/07/23
Ok, after adding recommendations, I send purchase orders to my suppliers.
Just to be simple, I don't have any other production, and none of the items are included in other BOMs.
Let's say, on 2015/07/20 the supplier of G0001 informs me that - due to some reason - he can't send me G0001 on time (2015/07/23), just on 2015/07/27.
I can't do anything, accept the delay, so i change the due date of G0001's purchase order to 2015/07/27.
BUT, this means that the whole production of A0001 is out of time, it cannot be finished by 2015/07/31.
The problem is that I have to manually "investigate" what this change causes. Maybe in a very simple case (like I wrote above) it can be done, but in a real business case the delayed item can be part of other productions also, not just one item can have a delay, the production can have more levels, etc.
I know this is a hard question to find answer to, because it can have many-many parameters.
I'm trying to gather information about how you - colleagues and experts - handle these situations, is there any better way than the one I wrote.
Hope the example was clear.
Thanks,
Ferenc