# Production Order

Hi, I have 2 questions :

1. I’m creating a RO, Item : 1250, Qty = 15, Scrap Item = 5%.
BOM 1250 :
• 1251 [Type : Item, Qty = 1, Scrap BOM = 0%]
• 1255 [Type : Item, Qty = 40, Scrap BOM = 10%]
• 1300 [Type : Production BOM, Qty = 6, Scrap BOM = 4%]
BOM 1300 :
• 1310 [Type : Item, Qty = 1, Scrap BOM = 3%]
• 1320 [Type : Item, Qty = 50, Scrap BOM = 2%]
• 1330 [Type : Item, Qty = 1, Scrap BOM = 0%]

For example, to get Qty for 1310 is :
1310 = Qty RO * Qty BOM 1300 * Scrap Item 1250 * Scrap BOM 1300 * Scrap Routing * Qty BOM 1320 * Scrap Item 1250 * Scrap BOM 1320
= 15 * 6 * 1.05 * 1.04 * 1.06 * 1.03 * 1.02 * 50 * 1.05
= 5746.0276692
But, the program show the result = 5746.04831
Can anybody suggest me what to check? Maybe i miss some formulas here.

1. What is the difference between Refresh and Replan?

2. I have a Firm Planned Prod Order. Source Type = Item 70200.
When i refresh, it got 2 lines :

• 70200
1. Flushing = Forward, Replenishment System = Prod Order, Manufacturing Policy = MTO.
When i change the status to Released, it shows error like this : Reserved Item 70109 is not on inventory whereas there are enough stock. Have any idea?

Question 1 I do not understand your question, you seem to have added 1300 into the standard BOM of 1250, are you trying to calculate how many 1310’s you need to make 15 1250’s? I think not as the math is way out - not sure what you are doing here or asking.

Question 2. Refresh will update the scheduling, it will also re-write the produciton line, bringing in the new routing or BOM. Replan only affects the scheduling.

Question 3. Simply put you do not have the stock. Which warehouse is the stock in? Which warehouse is set in the “components at location” field?

Question 1 : Yes, I’m trying to calculate how many 1310’s needs to make 15 1250’s. i confuse with the quantity resulted from navision for 1310’s quantity. it differs from my math.

Question 3 : Item 70109 doesn’t set to any location. thats why i’m confuse why there isn’t any stock

Question 1. I am ignoring scrap as you are confusing me enough [:D]

You need 15 1250’s, to make 1 of these you need a 6 1300’s per, therefore you need 90 1300’s, which is itself is a BOM where you need 1 1310 per so you need 90 1310’s to make 15 1250’s. So why are you needing 5000+?

Question 3. The driving location is the production order. Load the production order, then look at the item card for 70109 and see if the warehouses match, they will not and they need too.

Question 1 Sory. it must be formula to make 1320 not 1310. so it needs to calculate 50 because to make one 1300 , it needs 50 1320.