scheduling

[Former Member]

hi gurus,

what is forward and backward scheduling and how does it help availability check.

siva

[Former Member]

Hi Siva,

I will try to explain you with an example.

First of all system always start with the backward scheduling and then go to forward scheduling.

Let us assume that today's date is 09.04.2007 and the customer is asking for the delivery on 13.04.2007.But your procurement(3 days) or production(5 days) or delivery(2 days) time together takes 10 days so the system will start doing backward scheduling starting on 13.04.2007and will subtract 3 days of procurement,5 days of production,2 days for delivery and the final date would be 03.04.2007 which is not possible as the date is in the past.

As the backward scheduling is failing in this case then the system will start doing forward scheduling and would automatically throw the date as 19.04.2007 after dong the avl check.

I hope this is helpful for your.

Regards

Karan

[Former Member]

hi siva,

Backward scheduling is the calculation of deadline dates: the arrival time at the customer site is calculated as the earliest possible goods receipt time at the customers unloading point on the requested delivery date. All four of the delivery and transportation scheduling lead times are subtracted from the customer’s requested delivery date to determine if this date can be met.

The transit time, loading time, and pick/pack time are subtracted from the customer’s requested delivery date to calculate the required material availability date.

The system calculates backward scheduling as follows:

Requested delivery date minus transit time = Goods issue date

Goods issue date minus loading time = Loading date

Loading date minus transportation lead time = Transportation scheduling date

Loading date minus pick/pack time = Material availability date

By default, the system will calculate delivery dates the closest day, taking into consideration the working days of the shipping point and a rounding profile. In this case the system assumes a 24 hour work day and lead times can be entered in days up to 2 decimal points. This is referred to as daily scheduling.

Precise scheduling calculated down to the day, hour and minute is supported. This allows the scheduling of a delivery within a single day. It is activated by maintaining the working hours for a particular shipping point.

Backward scheduling is always carried out first. If the material availability date or transportation scheduling date is calculated to be in the past, the system must then use forward scheduling.

Forward scheduling is also done if no product is available on the material availability date calculated by backward scheduling. The system does an availability check to determine the first possible date when product will be available. This new material availability date forms the starting point for scheduling the remaining activities. The loading time, pick/pack time, transit time, and transportation lead time are added to the new material availability date to calculate the confirmed delivery date.

Pl. reward if it helps.

Thanks & Regards

Sadhu Kishore