forward method and backward method

what is the step for scheduling direction : forward and backward when refresh production order? thx

backward will shedule the production order from it’s due date and backward. (it sais when you should start to finish it on time, considering the lead time)

forward will schedule it, from the starting date in the PRoduction order header untill it is finished (tell you when is the expected finish date if you start now)

is that what you mean?

When i run Refresh on Production Order, it seems no different whether i choose Scheduling direction forward or backward. Do anyone have a case to show the difference between run Forward or backward?

Thx

Are you testing this in Cronus with an item or order? If you are can you tell us the item and the dates you are using? If not can you tell me the routing times and the options you are selecting on the refresh.

Yes, I’m testing in Cronus with an item.

BOM :

Type No. Description Quantity per Unit of Measure Code Scrap % Routing Link Code Production Lead Time Starting Date Ending Date
Item 1251 Axle Back Wheel 1 PCS 0
Item 1255 Socket Back 1 PCS 0

Routing :

Operation No. Previous Operation No. Next Operation No. Type No. Routing Link Code Description Setup Time Setup Time Unit of Meas. Code Run Time Run Time Unit of Meas. Code Wait Time Wait Time Unit of Meas. Code Move Time Move Time Unit of Meas. Code Fixed Scrap Quantity Scrap Factor %
10
20 Work Center 100 100 Rim assembly 60 MINUTES 5 MINUTES 0 MINUTES 0 MINUTES 0 0
20 10 30 Machine Center 410
Drilling 60 MINUTES 8 MINUTES 0 MINUTES 0 MINUTES 10 0
30 20 40 Machine Center 420
Deburr 20 MINUTES 9 MINUTES 0 MINUTES 0 MINUTES 0 0
40 30 50 Machine Center 440 300 Machine Inspection 10 MINUTES 5 MINUTES 0 MINUTES 0 MINUTES 0 0
50 40
Machine Center 110
Wheel assembly 30 MINUTES 12 MINUTES 0 MINUTES 0 MINUTES 0 0

Backward :

Item No. Due Date Description Production BOM No. Routing No. Starting Date-Time Ending Date-Time Scrap % Quantity Reserved Quantity Unit of Measure Code
1250 1/25/2001 Back Hub 1250 1200 1/23/2001 12:51 1/24/2001 16:00 5 15 0 PCS
1251 1/23/2001 Axle Back Wheel

1/23/2001 12:51 1/23/2001 12:51 5 25.75 25.75 PCS

Forward :

Item No. Due Date Description Production BOM No. Routing No. Starting Date-Time Ending Date-Time Scrap % Quantity Reserved Quantity Unit of Measure Code
1250 1/25/2001 Back Hub 1250 1200 1/23/2001 12:51 1/24/2001 13:15 5 15 0 PCS
1251 1/23/2001 Axle Back Wheel

1/23/2001 12:51 1/23/2001 12:51 5 25.75 25.75 PCS

I can see there are difference between Forward Ending Date-Time and Backward Ending Date Time. But i don’t have idea where the time comes from?

HI Motion,

Have you ever looked at Time Machine? www.solution-soft.com

Could be the best forward and back date testing software available.

Regards,

SD